HomeMy WebLinkAboutR-91-0376J-91-470
5/21/91
9 ! -- `11 7 6"
RESOLUTION NO.
A RESOLUTION, WITH ATTACHMENTS, AMENDING
SECTION 2 OF RESOLUTION NO. 90-819, ADOPTED
OCTOBER 16, 1990, WHICH APPROVED THE
INSTALLATION OF TRAFFIC REGULATORY SIGNS IN
THE NORTH COCONUT GROVE NEIGHBORHOOD OF THE
CITY OF MIAMI, FLORIDA, ON A NINETY (90) DAY
TRIAL BASIS, IN SUBSTANTIAL ACCORDANCE WITH
THE ATTACHED AMENDED PLAN "B"f TO THEREBY
EXTEND THE NINETY (90) DAY PERIOD UNTIL SUCH
TIME THAT A MORE COMPREHENSIVE `.PRAFFIC STUDY
IS COMPLETED; DIRECTING THE CITY MANAGER TO
INSTRUCT THE DIRECTOR OF PUBLIC WORKS TO
CONDUCT SAID TRAFFIC STUDY; FURTHER DIRECTING
THE CITY MANAGER TO INSTRUCT THE DIRECTOR OF
PUBLIC WORKS TO TRANSMIT A COPY OF THIS
RESOLUTION TO THE HEREIN NAMED OFFICIALS.
WHEREAS, the Miami City Commission, at its meeting of
October 18, 1990, adopted Resolution No. 90-819 approving the
installation of traffic regulatory signs in the North Coconut
Grove Neighborhood of the City of Miami on a ninety (90) day
trial basis, in substantial accordance with Amended Plan "B"; and
WHEREAS, the Police Department, Fire, Rescue and Inspection
Services Department, Solid Waste Department and Public Works
Department have evaluated the effects of the traffic regulatory
signs on their various operations during the ninety (90) day
trial period and have expressed no substantial objections to the
permanent implementation of Amended Plan "B"; and
WHEREAS, the Miami City Commission, at its meeting of
March 14, 1991, in considering the implementation of Amended Plan
"B" on a permanent basis, adopted Motion No. 91-238 directing the
City Manager to perform a traffic study; and
WHEREAS, the Miami City Commission, at its meeting of May 9,
1991, in considering the implementation of Amended Plan "B" on a
permanent basis, directed the City Manager to perform a more
comprehensive traffic study and approved the extension of the
ninety (90) day trial period until such time that a more
comprehensive traffic study is completed;
NOW, THEREFORE, BE IT RESOLVED BY THE COMMISSION OF THE CITY
OF MIAMI, FLORIDA:
aTTACNMENTS
� CONTAINED
CITY C01,07- II 3'ION
MEE V I OF
MAY 9 1991
y�- 376
�otvrwR eo.
J-91-470
5/21/91
c1 ! - I "t 6
RESOLUTION NO.
A RESOLUTION, WITH ATTACHMENTS, AMENDING
SECTION 2 OF RESOLUTION NO. 90-819, ADOPTED
OCTOBER 18, 1990, WHICH APPROVED THE
INSTALLATION OF TRAFFIC REGULATORY SIGNS IN
THE NORTH COCONUT GROVE NEIGHBORHOOD OF THE
CITY OF MIAMI, FLORIDA, ON A NINETY (90) DAY
TRIAL BASIS, IN SUBSTANTIAL ACCORDANCE WITH
THE ATTACHED AMENDED PLAN "B", TO THEREBY
EXTEND THE NINETY (90) DAY PERIOD UNTIL SUCH
TIME THAT A MORE COMPREHENSIVE TRAFFIC STUDY
IS COMP)-=ED; DIRECTING THE CITY MANAGER TO
INSTRUCT THE DIRECTOR OF PUBLIC WORKS TO
CONDUCT SAID TRAFFIC STUDY; FURTHER DIRECTING
THE CITY MANAGER TO INSTRUCT THE DIRECTOR OF
PUBLIC WORKS TO TRANSMIT A COPY OF THIS
RESOLUTION TO THE HEREIN NAMED OFFICIALS.
WHEREAS, the Miami City Commission, at its meeting of
October 18, 1990, adopted Resolution No. 90-819 approving the
installation of traffic regulatory signs in the North Coconut
Grove Neighborhood of the City of Miami on a ninety (90) day
trial basis, in substantial accordance with Amended Plan "B"; and
WHEREAS, the Police Department, Fire, Rescue and Inspection
Services Department, Solid Waste Department and Public Works
Department have evaluated the effects of the traffic regulatory
signs on their various operations during the ninety (90) day
trial period and have expressed no substantial objections to the
permanent implementation of Amended Plan "B"; and
WHEREAS, the Miami City Commission, at its meeting of
March 14, 1991, in considering the implementation of Amended Plan
"B" on a permanent basis, adopted Motion No. 91-238 directing the
City Manager to perform a traffic study; and
WHEREAS, the Miami City Commission, at its meeting of May 9,
1991, in considering the implementation of Amended Plan "B" on a
permanent basis, directed the City Manager to perform a more
comprehensive traffic study and approved the extension of the
ninety (90) day trial period until such time that a more
comprehensive traffic study is completed;
NOW, THEREFORE, BE IT RESOLVED BY THE COMMISSION OF THE CITY
OF MIAMI, FLORIDA:
ATTACHMENTS
T CoIND
CITY CC 4,1741ISSION
MEETTI,;pj OF
MAY A 1991
nmwrm fo.
Section 1. The recitals and findings contained in the
Preamble to this Resolution are hereby adopted by reference
hereto and incorporated by reference herein as if fully set forth
in this section.
Section 2. Section 2 of Resolution No. 90-819, adopted
October 18, 1990, is amended in the following particulars:
"Section 2. The installation of traffic
regulatory signs,
perioc} until such time that a more comprehensive
traffic study is completed, in substantial
accordance with the attached amended Plan, (Plan
B) in the North Coconut Grove neighborhood bounded
by South Dixie Highway, Southwest 28 Street,
Southwest 22 Avenue and Southwest 27 Avenue, in
the City of Miami, Florida is hereby approved."
Section 3. The City Manager is hereby directed to instruct
the Director of Public Works to conduct a more comprehensive
traffic study.
Section 4. The City Manager is hereby directed to instruct
the Director of Public Works to transmit a copy of this
Resolution to Dade County Manager, Joaquin Avino, and the
Director of the Dade County Public Works Department, Walter
Herndon.
Section 5. This Resolution shall become effective
immediately upon its adoption.
PASSED AND ADOPTED this 9th day of May , 1991.
XAVIER L. SVAREZ, MA'
ATTE C✓'
MAT Y HIRAI, CITY CLERK
PREPARED AND APPROVED BY:
e-- Y?l - a-" ,
IRMA M. ABELLA
ASSISTANT CITY ATTORNEY
APPROVED AS TO FORM AND CORRECTNESS:
CITY A'
M2226
AMEAjDED PLAN
P,eOP0560 'WAFFIC
pArr6A2,U C14ANr2F-(OQE-WAY)
E)(tSTIMC, 'reAFFIr-
PATTERN UAJCX4ANGED
I"DO NOT EAJTEe -I
9-70oq
w
2458 SW 27 Lane
Miami, Florida 33133
9 May 1991
City Commission
Dinner Key, Florida
Dear Commissioners:
First of all, I am in complete agreement with the correspondence sent to
Mayor Suarez and Dr. Prieto-Portar - City Public Works Director by
MR. James Armstrong and dated May 6, 1991.
Secondly, I am still puzzled as to why we are "forced" to restrictions
on the streets in the neighborhood and not have "status quo" as an
alternative approach.? As you will recall, a survey of the area bounded
by SW 22 and 27 Avenues and SW 27 Lane and US 1 revealed that 56% of the
homes interviewed supported status quo for the then existing traffic
patterns as presented by Mr. Walter Herndon - Dade County Public Works
Director.
The traffic impact analysis recommends no further restrictions because
the present restrictions meet concurrencv level of service. I thought the
purpose of the traffic study was to consider traffic patterns from South
Bayshore to US 1,SW 27 Avenue to SW 22 Avenue and to make recommendations
for solutions for undesirable through traffic,servicing and to a
.lessor degree crime. Not to justify what has already been put into place
on a temporary "permanent "basis. As Commissioner Plummer suggested, could
the traffic study consider alternatives to a certain signalized intersection?
Proposed recommendations could have suggested the "opening up" of some
of the already existing barracaded streets for better access rather than
having vehicles travel against the one-way of SW 28 Street to gain entry
to the barracaded neighborhood. By the way city vehicles no longer travel
against the one-way they now back down the entire length of the block
in order not to be forced on to US 1 when servicing SW 27 Lane for trash
pickup.
As the traffic analysis document points out the present conditions of
barracades and one-way streets "inconveniences residents by decreasing the
available number of entry/exit points and requires residents to
use high traffic volume roadways".
I would like to suggest a return to status quo remove most of the barracades
and then conduct a more appropriate traffic analysis rather than the
justification of what currently exists. The study area should consider
the entire neighborhood from South Bayshore to US 1 and include the
proposed widening of SW 27 Avenue and its adjacent area to the west.
Respectfully,
/Q°w,
Tom Spehar
xec:.a
91 _... 376 City Clerk
4s
CITY OF MIAMI, FLORIDA
INTER -OFFICE MEMORANDUM
TO Honorable Mayor and Members of
the City Commission
FROM t
Cesar H. Odio
City 'Manager
RECOMMENDATION:
DATE : M • R - 4 1991 FILE
SUBJECT : "One -Way" Traffic Signs in
the North Coconut Grove
"Overbrook" Neighborhood
REFERENCES:
ENCLOSURR6e. S 01 u t l o n, Amended
Plan "B", Department Comments
It is respectfully recommended that the City Commission adopt the
attached Resolution authorizing the permanent installation of
"one-way" traffic regulatory signs in the North Coconut Grove
"Overbrook" Neighborhood in accordance with Amended Plan "B".
BACKGROUND:
Responding to neighborhood residents' concerns about undesirable
traffic intrusion into the "Overbrook" neighborhood, bounded by
S.W. 22 and 27 Avenues and by South Dixie Highway and S.W. 28
Street, the City Commission approved Resolution No, 90-308 on
April 12, 1990 urging Metropolitan Dade County to install. "one-
way" traffic regulatory signs in accordance with Amended Plan
toB"
Metropolitan Dade County initially denied this request, however,
after further investigation of traffic conditions in the
neighborhood and other less desirable alternatives, including
barricades, reconsidered their position and approved implementing
Amended Plan "B" on a trial basis. On October 18, 1990 the City
Commission approved Resolution No. 90-819 recommending that
Amended Plan "B" be implemented on a ninety (90) day trial basis.
Metropolitan Dade County completed installation of the traffic
regulatory signs contained in the plan on December 3, 1990. The
City's Police Department has been rigorously enforcing the "one-
way" regulations and between December 3, 1990 and February 14,
1991 have written 52 summonses for violation of the "one-way"
restrictions.
The end of the ninety (90) day trial period has elapsed and it is
now in order to discuss the permanent implementation of Amended
Plan "B", as currently posted in the neighborhood.
The neighborhood property owners were notified by mail on
February 14, 1991 of the public hearing. The Police, Fire,
Rescue and Inspection Services, Solid Waste and Public Works
Departments have evaluated the effects of the restrictions on
their various operations and have no problem with the
restrictions contained in Amended Plan "B".
or -
91-- 376
'�� q6 —1
INTER -OFFICE MEMORANDUM
TO Honorable Mayor and Members DATE APR 2 91991 FILE
of the City Commission
SUBJECT "One -Way" Traffic Signs In
the North Coconut Grove
"Overbrook" Neighborhood
VROM REFERENCES
Cesar H. Od t o ENCLOSURES Tra f f I c Study
City Manager
At the March 14, 1991 City Commission meeting a public hearing
was held to consider the permanent Implementation of Amended
Plan "B", the "One -Way" traffic signs In the North Coconut Grove
"Overbrook" neighborhood bounded by S.W. 22 and 27 Avenues and by
South Dixie Highway and S.W. 28 Street. Several residents of the
neighborhood were In attendance and expressed their displeasure
with the "one-way" traffic plan. The City Commission deferred
this Item and directed the Public Works Department to prepare a
traffic study of the neighborhood for reconsideration at the May
9, 1991 Commission meeting.
Enclosed Is a copy of the traffic study prepared by the Public
Works Department. Please Include this study with your
May 9, 1991 agenda package concerning the "one-way" traffic signs
In the North Coconut Grove "Overbrook" neighborhood.
Z
91 -- 376
i � F
CITY OF MIAMI
TRAFFIC IMPACT ANALYSIS
SOUTHWEST 28 STREET NEIGHBORHOOD
PREPARED BY :
CITY OF MIAMI PUBLIC WORKS DEPARTMENT
APRIL , 1991
3
91--- 376
TABLE OF CONTENTS
PAGE
INTRODUCTION
BACKGROUND
FINDINGS 2-
CONCLUSIONS 9
RECOMMENDATIONS
�2
APPENDIX
61
0
SOUTHWEST 28 STREET NEIGHBORHOOD TRAFFIC ANALYSIS
INTRODUCTION
This traffic Impact analysis will study the traffic circulation
patterns In the north Coconut Grove neighborhood bounded by South
Dixie Highway, South Bayshore Drive, Southwest 22 Avenue and
Southwest 27 Avenue, hereinafter referred to as the "study area".
The study will begin prior to any restrictions of the public
roadways being Implemented In this neighborhood and analyze the
Impact of each subsequent traffic restriction authorized by the
City Commission. An option for additional street barricades will
be considered. The traffic Impact of the restrictions requested
by the neighborhood residents will be assessed and compared with
the traffic circulation requirements necessary to serve those
neighborhood residents and the Clty's commitment to provide an
adequate transportation network to fulfill the State of Florida's
land use concurrency requirements.
BACKGROUND
In response to neighborhood concerns about undesirable traffic
Intrusion and excessive on street parking In their neighborhood,
the.Mlaml City Commission passed Resolution No. 89-485 on
May 25, 1989 authorizing the permanent restriction of vehicular
access to Andros, Abaco, Inagua, Swanson, Trapp and Lincoln
Avenues at their Intersection with Aviation Avenue, Inagua, Trapp
and Lincoln Avenues at their Intersection with S.W. 27 Avenue and
Jefferson Street at Its Intersection with S.W. 28 Street.
Permanent, landscaped barriers have since been constructed. by
the neighborhood residents, at the approved locations.
Shortly thereafter, the residents along S.W. 28 Street expressed
_ similar concerns about Increased undesirable traffic Intrusion
and excessive vehicle speeds In their neighborhood, due to the
permanent street barricades Installed south of their
neighborhood. The residents presented their request for traffic
controls along S.W. 28 Street to the City Commission at the
January 25, 1990 meeting. The restriction of vehicular access
was discussed and after considering recommendations against
barricades from the Clty's Police, Fire, Solid Waste and Public
Works Departments, the Metropolitan Dade County Public Works
Department and several residents of the neighborhood that would
be directly affected, the Commission decided not to Implement
vehicular access restrictions on S.W. 28 Street and directed the
Public Works Department to conduct a neighborhood meeting to
consider methods of traffic control other than barricades.
91-.. 376
A
On March 29, 1990 a neighborhood meeting was conducted where
several traffic control plans were presented by the Public Works
Department and discussed. The plan favored by a majority of the
residents In attendance was a "one way" street plan called Plan
"B". An amended version of this plan was approved on a trlai
basis by the City Commission on April 12, 1990 and after a
lengthy review by the Metropolitan Dade County Public Works
Department, was Implemented on October 18, 1990. The "one-way"
Amended Plan "B" allows vehicular traffic to exit the
neighborhood but restricts the ability to enter the neighborhood,
thereby eliminating commuter traffic from utilizing S.W. 28
Street to avoid congested South Dixie Highway. Adequate
emergency vehicle access Is maintained under these restrictions.
Reports from neighborhood residents have Indicated that vehicular
traffic has been significantly reduced even though some
violations of the "one-way" restrictions do occur. In an attempt
to enforce the "one-way" restrictions, the Clty's Poilce
Department has Issued 52 citations during the trial period.
At their March 14, 1991 meeting, the City Commission considered
the permanent Installation of the "one-way" traffic plan.
Several neighborhood residents In attendance expressed a desire
to Implement vehicular access restrictions on a trial basis and
delay consideration of a permanent "one-way" traffic plan. The
City Commission deferred this item to the May 9, 1991 meeting and
directed the Public Works Department to prepare a new traffic
study of the neighborhood for presentation at that meeting.
FINDINGS
On May 19, 1988, the City Commission passed Resolution No. 88-840
temporarily restricting vehicular access to certain streets east
of Aviation Avenue and Southwest 27 Avenue. Prior to this date,
all of the public roadways within the study area were
unrestricted and vehicular traffic was allowed to circulate
freely. Figure 1 Illustrates the daily vehicular traffic counts
experienced by the major roadways servicing the study area.
Southwest 28 Street between Southwest 22 and 27 Avenues Is
classified a "residential collector" roadway and, prior to any
restrictions within the study area, was recelving 1,296* daily
vehicle trips with a peak hour lane volume of 111 trips. Using
this crlterla, the Institute of Transportation Engineer's
Transportation and Traffic Engineering Handbook (1976) assigns a
level of service rating of "A" to this roadway, the most
favorable traffic condition. By contrast, Tigertall Avenue and
South Bayshore Drive, both two lane roadways carry 10,065 and
19,157 daily vehicle trips respectively receiving less favorable
levels of service and South Dixie Highway with 77,764 daily
vehicle trips receives the lowest level of service rating of "F".
The unrestricted roadways contained In Figure i adequately
provide for the traffic circulation and emergency vehicular
access needs of the study area.
*April 1, 1987 vehicle traffic count
PA
x
11
91-- 376
On March 29, 1990 a neighborhood meeting was conducted where
several traffic control plans were presented by the Public Works
Department and discussed. The plan favored by a majority of the
residents In attendance was a "one way" street plan called Plan
" B " . An amended version of this plan was approved on a trial
basis by the City Commission on April 12, 1990 and after a
lengthy review by the Metropolitan Dade County Public Works
Department, was Implemented on October 18, 1990. The "one-way"
Amended Plan "B" allows vehicular traffic to exit the
neighborhood but restricts the ability to enter the neighborhood,
thereby eliminating commuter traffic from utilizing S.W. 28
Street to avoid congested South Dixie Highway. Adequate
emergency vehicle access Is maintained under these restrictions.
Reports from neighborhood residents have indicated that vehicular
traffic has been significantly reduced even though some
violations of the "one-way" restrictions do occur. In an attempt
to enforce the "one-way" restrictions, the City's Police
Department has Issued 52 citations during the trial period.
At their March 14, 1991 meeting, the City Commission considered
the permanent installation of the "one-way" traffic plan.
Several neighborhood residents In attendance expressed a desire
to Implement vehicular access restrictions on a trial basis and
delay consideration of a permanent "one-way" traffic plan. The
City Commission deferred this Item to the May 9, 1991 meeting and
directed the Public Works Department to prepare a new traffic
study of the neighborhood for presentation at that meeting.
FINDINGS
On May 19, 1988, the City Commission passed Resolution No. 88-840
temporarily restricting vehicular access to certain streets east
of Aviation Avenue and Southwest 27 Avenue. Prior to this date,
all of the public roadways within the study area were
unrestricted and vehicular traffic was allowed to circulate
freely. Figure 1 Illustrates the daily vehicular traffic counts
experienced by the major roadways servicing the study area.
Southwest 28 Street between Southwest 22 and 27 Avenues Is
classified a "residential collector" roadway and, prior to any
restrictions within the study area, was receiving 1,296* daily
vehicle trips with a peak hour lane volume of 111 trips. Using
this criteria, the Institute of Transportation Engineer's
Transportation and Traffic Engineering Handbook (1976) assigns a
level of service rating of "A" to this roadway, the most
favorable traffic condition. By contrast, Tigertall Avenue and
South Bayshore Drive, both two lane roadways carry 10,063 and
19,157 daily vehicle trips respectively receiving less favorable
levels of service and South Dixie Highway with 77,764 daily
vehicle trips receives the lowest level of service rating of "F".
The unrestricted roadways contained In Figure 1 adequately
provide for the traffic circulation and emergency vehicular
access needs of the study area.
*April 1, 1987 vehicle traffic count
L
1.
91-- 376
tS
FIGURE I
DAILY TRAFFIC VOLUME
PRIOR TO ANY ROADWAY
RESTRICTIONS (4 • I.87)
3
v 6`4
sEXISTING TRAFFIC SIGNAL
*PEAK HOUR . LANE VOLUME: III CARS
LEVEL OF SERVICE ; A
91-76
I
It,
FIGURE 2
DAILY TRAFFIC VOLUME
GENERATED BY THE NEIGHBORHOOD
RESIDENTS
RAW
u
I
i
sEXISTING TRAFFIC SIGNAL
BASED ON THE I.T.E. TRIP
GENERATION MANUAL
01
The neighborhood was studied to determine the number daily
vehicle trips generated by the local residents and compared to
the total traffic volume counted along Southwest 28 Street to
determine the volume of "outside" traffic Intruding Into the
neighborhood. Using the Institute of Transportation Engineer's
Trip Generation* manual, Fourth edition, approximately 2,606
dally vehicle trips are generated by the local residents In the
study area south of Southwest 28 Street and 2,179 daily vehicle
trips are generated by the local residents and businesses In the
study area located north of Southwest 28 Street. Assuming that
these trips are evenly distributed between the entry/exit points
onto South Dixie Highway, Southwest 22 Avenue, Tigertall Avenue,
Aviation Avenue, Southwest 27 Avenue and the residential
collector Southwest 28 Street, It was determined that
approximately 522 dally vehicle trips (40%) on Southwest 28
Street were generated by the local residents. The remainder of
the trips, 774, are attributed to traffic generated outside of
the neighborhood that are using this residential collector
between Southwest 22 and 27 Avenue. Figure 2 shown the dally
traffic volume generated by the study area and the location of
the traffic counter on Southwest 28 Street.
After approval of the vehicular access restrictions (barricades),
shown on Figure 3, on May 19, 1988 and their subsequent permanent
approval on May 25, 1989, the daily vehicular traffic count on
Southwest 28 Street Increased to 2,097 with a peak hour lane
volume of 122 trips. This peak hour lane volume count Is still
well below the criteria established by the Institute of
Transportation Engineer's to maintain a level of .service rating
of "A". Since the study area stilt generated the same 522 dally
vehicle trips on Southwest 28 Street, the remaining 1,575 dally
vehicle trips must be attributed to "outside" traffic. The
barricades south of Southwest 28 Street have forced "outside"
traffic to remain on Southwest 28 Street thereby Increasing
traffic volume on this roadway. Traffic volumes on Southwest 27
Terrace and Southwest 27 Lane were largely unaffected by the
barricades placed south of Southwest 28 Street.
The street barricades south of Southwest 28 Street have
significantly affected the Intersections of Tigertall Avenue at
Aviation Avenue and Southwest 28 Street at Southwest 27 Avenue.
The traffic generated by the residents of the study area that
formerly used the entry/exit points along Aviation Avenue and
Southwest 27 Avenue now are forced to utilize the aforementioned
Intersections, contributing an estimated 434 dally vehicle trips
to each of these Intersections than occurred prior to the street
barricading.
*The I.T.E. Trip Generation manual collected data from thousands
of neighborhoods across the county and arrived at an average of
10.062 dally vehicle trips per single family dwelling unit.
These trips Include those by the residents themselves and
service/delivery vehicles serving those residents. (See
appendix for calculation)
5
0
9 376
FIGURE 3
DAILY TRAFFIC VOLUME
AFTER BARRICADES WERE
INSTALLED ALONG AVIATION
AVENUE (4 •I6.90 )
...........
I_e5t�
n
<!
31
EXISTING TRAFFIC SIGNAL
IEXISTING BARRICADE
PEAK HOUR LANE VOLUME = 122 CARS
LEVEL OF SERVICE : A
0, 0
Although the permanent street barricades constructed south of
Southwest 28 Street provide for emergency vehicle access, non -
emergency functions such as deliveries, solid waste pick up and
postal delivery will be delayed due to reduced traffic
circulation capability.
the neighborhood located
These delays may also affect services in
north of Southwest 28 Street.
The "one-way" street restrictions shown on Figure 4 were
Implemented on October 18, 1990. These restrictions were
approved, on a temporary basis, to address those concerns from
the residents of the study area north of Southwest 28 Street
about Increased traffic volume In their neighborhood. The "one-
way" restrictions In addition to the existing street barricades
currently restrict all vehicular traffic In the study area.
"Outside" traffic entering the neighborhood has been virtually
eliminated, there remaining only one circuitous connection
between Southwest 22 Avenue and Southwest 27 Avenue, Southwest 27
Way. Citizens residing on Southwest 27 Way have reported
significant Increases In vehicular traffic volume and speed.
Although the traffic generated In the study area that utilizes
Southwest 28 Street has been reduced (261 daily vehicle trips or
one half of 522 since Southwest 28 Street is exiting traffic
only), the majority of the area residents must now gain access by
Tlgertall Avenue or South Dixie Highway. Figure 4 demonstrates
the estimated number of additional daily vehicle trips that will
burden Tlgertall Avenue (698 daily vehicle trips) and South Dixie
Highway (449 daily vehicle trips) further reducing their levels
of service.
The addition of "one-way" street restrictions to the study
further Inconveniences residents by decreasing the available
number of entry/exit points Into their neighborhood, requires
residents to use high traffic volume roadways (South Dixie
Highway and Tlgertall Avenue) to gain access and delays non -
emergency services. The "one-way" traffic plan, however,
provides for complete emergency vehicle response.
An option that has been discussed at several public hearings Is
the complete restriction of vehicular access, by barricades, of
the study area, shown on Figure 5. If this proposal were to be
Implemented, the following Impact on traffic circulation most
likely would occur.
All east/west traffic movement through the neighborhood would
physically be restricted, thereby eliminating the vast majority
of "outside" traffic from the neighborhood. The study area still
generates a total of 4,785 dally vehicle trips that must be
accommodated by other routes.
N
9 1 --_ 376
FIC20E 4
CURRENT CONDITIONS WITH
TEMPORARY "ONE-WAY" STREETS
9
AV rw
ri
r
ADDITIONAL DAILY
VEHICLE TRIPS
EXISTING TRAFFIC SIGNAL
' EXISTING BARRICADE
ONE-WAY" DIRECTION OF
TRAFFIC FLOW
91 176
Figure 5 shows the estimated, number of additional daily vehicle
trips that will burden Tlgertall Avenue (598 daily vehicle trips)
and South Dixie Highway (598 dally vehicle trips). Although the
total number of additional daily vehicle trips added to South
Dixie Highway and Tlgertall Avenue Is similar to the "one-way"
street plan, the overall access to the neighborhood Is severely
restricted. In addition to delays experienced by non -emergency
services, emergency vehicles may now experience some delays, even
If provisions are made for emergency vehicle passage through the
barricade. An Important link between two arterial roadways,
Southwest 28 Street, will be completely taken out of service and
Its effectiveness as a residential collector (it is zoned a wider
width than most residential roadways, 60 feet) will be
diminished.
CONCLUSIONS
As has been shown, any roadway restrictions placed on the street
network diminish the traffic circulation and access requirements
of this Coconut Grove neighborhood and Impacts traffic on
surrounding roadways and neighborhoods. From a traffic
circulation viewpoint all public roadways should be available and
unrestricted to the citizens that rely on the traffic network.
The levels of service of the Interior roadways In the study area
are rated "A", the best traffic condition available, under all
conditions Indicating that traffic volumes through the
neighborhood are much less than the roadways and Intersections
are designed to handle. The restrictions do however affect
emergency and non -emergency service.
Vehicular traffic re -directed onto other roadways because of
certain restrictions diminishes the level of service on those
alternate roadways. The reduction of the level of service on the
alternate roadways Is of special concern when those roadways
already experience poor levels of service such as Tigertall
Avenue and South Dixie Highway. Reductions In transportation
level of service directly affects the State mandated land use
concurrency requirements. The restrictions established for this
study area contribute to the traffic volume on Tlgertall Avenue
and South Dixie Highway, however, their total contribution
amounts to less than 10 percent of the total traffic volume on
these roadways.
This citizens residing In this study area generate their own
traffic in addition to unrelated neighborhood traffic. Using the
Institute of Transportation Engineer's data, the traffic volume
generated by the study area residents amounts to 40 percent of
the total traffic volume on Southwest 28 Street. Additional
roadway restrictions will adversely affect the local residents.
0
/3
91--- 376
11
FIGURE 5
ADDITIONAL. BARRICADES
_a y <
v
NOTE: ADDITIONAL BARRICADES
NOT RECOMMENDED BY
CITY OR COUNTY • DEPTS.
to
ADDITIONAL DAILY
VEHICLE TRIPS
EXISTING TRAFFIC SIGNAL
' EXISTING BARRICADE
ADDITIONAL BARRICADE
N
9 1 ._. 376
RECOMMENDATIONS
Traffic circulation, neighborhood access and traffic Impacts on
surrounding roadways and neighborhoods would best be served by
the elimination of all roadway restrictions In the study area.
Since It has been shown that the existing street barricades and
the temporary "one-way" streets do not diminish the level of
service of the Interior roadways of the study area cause a
manageable Impact on surrounding roadways and the residents of
the study area are willing to accept the Inconveniences due to
limited access, this traffic Impact analysis recommends that the
existing barricades in combination with the "one-way" streets
contained in Amended Plan "B" be the most restrictive traffic
regulations considered for the study area.
Because of the potential for emergency vehicle delays, non -
emergency service vehicle delays, the total elimination of a
residential collector roadway (Southwest 28 Street) and a
complete elimination of any vehicular access points on the west
side of the study area, this traffic Impact analysis recommends
against additional barricades being placed on Southwest 28 Street
and/or Southwest 27 Lane at their intersection with Southwest 26
Avenue. This recommendation Is further corroborated by
recommendations against these barricades from the Police, Fire,
Rescue and Inspection Services and Solid Waste Departments and
the Metropolitan Dade County Public Works Department. A copy of
these Department's recommendations Is Included In the appendix of
this analysis.
IS
91 3 76
APPENDIX
12
16
CALCULATION OF DAILY TRAFFIC VOLUME
GENERATED BY THE STUDY AREA AND ITS DISTRIBUTION
Institute of Transportation Engineer's Trip Generation manual,
Fourth edition anticipates 10.062 dally vehicle trips per single
family dwelling unit.
Study area south of S.W. 28 Street:
259 dwelling units x 10.062/du - 2,606 dally trips
Study area north of S.W. 28 Street:
185 dwelling units x 10.062/du - 1,862 daily trips
— 13,000 sq. ft. office x 0.02439/s.f. 317 daily trips
2,179 daily trips
Unrestricted Streets (prior to 5/19/88), Figure 1:
Study area south of S.W. 28 Street:
2,606 trips divided by 18 entry/exit points • 144.8 trips/point
Study area north of S.W. 28 Street:
2,.179 trips divided by 10 entry/exit
points
a
217.9
trips/point
Freeman at S.W. 28 St.
144.8
x
0.5
73
Kirk at S.W. 28 St.
144.8
x
0.5
73
Calusa at S.W. 28 St.
144.8
x
0.33
= 48
Lucaya at S.W. 28 St.
144.8
x
0.5
- 73
Jefferson at S.W. 28 St.
144.8
x
0.5
73
S.W. 23 Ave. at S.W. 28 St. :
217.9
x
0.5
- 109
S.W. 24 Ave. at S.W. 28 St. :
217.9
x
0.33
- 73
522 trips
It is anticipated that 522 dally vehicle
trips
along
Southwest 28
Street would be generated by study
area
residents
prior to
roadway restrictions.
Barricaded Streets, Figure 3:
It Is anticipated that the same volume of dally vehicle trips
along Southwest 28 Street, generated by study area residents,
would be recorded at the counter location because the residents
desiring to gain access to Southwest 27 Avenue via Andros, Abaco,
Inagua, Swanson, Trapp and Lincoln Avenues would utilize Lucaya
or Washington Streets thereby avoiding the traffic counter
located on Southwest 28 Street west of Southwest 24 Avenue. The
volume of traffic generated by study area residents on Southwest
28 Street between Lucaya and Jefferson Streets Is estimated to
have Increased by 434 dally vehicle trips due to the Installation
of the permanent barricades on May 19, 1988.
91-- 376
Barricaded Streets and "One -Way" Streets, Figure 4:
A total of 4,785 daily vehicle trips are generated In the study
area. It Is assumed one fourth enter/exit from each side of the
study area (1196) of which one half enter (598) and one half exit
(598). One half of the residents gaining Ingress from the west
(299) and one quarter gaining Ingress from the east (150) will
utilize South Dixie Highway (449 total). One half of the
residents desiring egress to the west (299), one half gaining
Ingress from the west (299) and one quarter gaining Ingress from
the east (150) will utilize Tlgereali Avenue (698 total).
Barricades On All Streets, Figure 5:
A total of 4,785 daily vehicle trips are generated in the study
area. It Is assumed one fourth enter/exit from each side of the
study area (1196) of which one half enter (598) and one half exit
(598). One half of the resident desiring egress to the west
(299) and one half gaining Ingress from the west (299) will
utilize South Dixie Highway (598 total). The same amount (598
total) would utilize Tigertall Avenue.
91-. 176
338 Transportation and Traffic Engineering Handbook
TABLE 8.14
Maximum Lane Service Volumes on Urban Arterials Based on
50 ; Cycle Split and an Average Denslty and Speed Criteria
Overall
Average
Approximate
Level
Travel
Volume*
or
Speed
Density
per Lane
Service
(mph)
(vpm)
(vph)
A
530
10
<300
B
525
20
Soo
C
>20
30
600
D
•.IS
45
675
E
ft l o
75
750
F
< 10
> 75
Variable
'The speed•densit- � olume relationships implicit to this table are correct only
if space mean speed is used. Overall average travel speed as usually measured
only approximates this value.
FACTORS AFFECTING ARTERIAL SERVICE VOLUMES
Quantitative means of estimating the effects of various common factors on arterial
service volumes are not readily available. Some of these factors are discussed below.
Signalized intersections. The operation of frequent signalized intersections and the
extent of progressive timing will usually be the principal determinant of arterial capaci-
ties and service volumes. These may be estimated by methods given in the following
section.
Unsignalized intersections. Turning movements and crossing volumes can reduce
arterial service volumes. One analysis method is to assume a signalized intersection
with green time proportionate to main and cross street volumes and geometrics.
Mid -block driveways. Both right and left turns into and from driveways reduce
arterial service volumes. Residential driveways can usually be ignored, but heavily
used commercial driveways become, for practical purposes, unsignalized intersections.
Curb parking or loading. The area occupied by parked vehicles is not available for
traffic movement. The effect on capacity and service volumes is thus equivalent to a
reduction in effective width of at least 8 ft. Additionally, in areas of heavy parking
turnover, a sporadic interruption in the adjacent lane will result from vehicles entering
or leaving parking spaces.
Even where parking or loading is legally prohibited, momentary stops to dis-
charge passengers, transit movements, and the possibility of illegal parking decrease
the desirability of a curb lane. The proximity to pedestrians and to fixed objects in
the border area and, frequently, an irregular cross slope to accommodate drainage
further decrease the attractiveness of a curb lane. In Australian practice, the curb
lane of multilane approaches (over 2 lanes) is penalized up to 60 percent, depending
on parking enforcement practices, prevalence of right turns, and downstream road-
way conditions.
91._ 13'76
METROPOLITAN DADEOUNTY, FLORIDA in
M&DADE R E C E I V E D V
METRO•DADE CENTER
1 PUBLIC WORKS DEPARTMENT
SUITE 1610
t� 111 N.W. 1st STREET
FL 11. MIAMI, FLORIOA 33128.1970
(305) 375-2092
December 29, 1988
Mr. Donald W. Cather, P.E.
Director
City of Miami
Department of Public Works
275 N.W. 2nd Street
Miami, Florida 33128
i Re: Closing of S.W. 28 Street
at S.W. 26 Avenue
SRF �40730
Dear Mr. Cather:
This is in response to your recent letter concerning the subject matter.
We have analyzed the traffic conditions on S.W. 28 Street and the impact
of traffic intrusion on adjoining residential streets that would result
from the proposed closure. A recent traffic count revealed that S.W.
28-Street carries 925 vehicles per day in the eastbound direction and 803
vehicles per day in the westbound direction.
SW 28 Street is currently used as a collector roadway for local
residents to access US-1 via its signalized intersections at S.W. 22
Avenue and S.W. 27 Avenue.
Closing of S.W. 28 Street, as shown on your Proposed Street Closure
Sketch would create several problems, some of which are listed below:
- Westbound motorists would be detoured to S.W. 24 Avenue, S.W.
27 Lane, and S.W. 26 Avenue, to circumvent the closure.
Eastbound motorists would travel in the opposite path. These
three roadway segments would be subject to additional collector
traffic volumes.
- Elimination of vehicular access would not be achieved, since
motorists will be able to drive around the barricade using the
above mentioned local streets. Thus, traffic volumes on S.W.
28 Street will probably not be noticeable altered.
- Motorists will be subjected to increased travel times,
additional fuel consumption and vehicle delays.
1. Equal Opponunlly/Handicap Employer/Services 2 v
91--- 376
Air. Donald W. Cather, P.E.
Page 2
(Continued)
- In case of life threatening emergencies, the proposed closure
may delay police, fire and emergency vehicles seeking access to
residents' homes.
We recommend that this roadway remain open for the reasons stated
above. We appreciate the opportunity to look into this matter for you.
Very truly yours,
Walter A. Herndon, ., P.E.
Director
WAH:MMH: en
91- 376
METROPOLITAN DADE I, ,jUNTY, FLORIDA
METRP�IA�E r; t C rV E D 04I���
A / METRO•DADE CENTER
15 22 + All 24 PUOUC WORKS DEPARTMENT
SUITE 1610
itt N.W. 1st STREET
t11 T Y 017 ."; ' ','! FL MIAMI, FLORIDA 33126.1970
" (305) 375-2987
February 17, 1989
Mr. Donald W. Cather, P.E.
Director, Public Works Department
City of Miami
275 N. W. Second Street
Miami, Florida 33128
RE: Closing of S. W. 27 Lane
at S. W. 26 Avenue
to Vehicular Traffic
Traffic Engineering Study No. 40853
Dear Mr. Cather:
This is in response to your request for an engineering study concerning
the proposed road closure at the above location.
Although the closure of S. W. 27 Lane along with S. W. 28 Street would
prevent the bypass phenomenon associated with barricading only S. W. 28
Street, as related in our previous letter concerning the proposed S. W. 28
Street closure, we find that this new proposal may create new problems.
All residents living east of both proposed closures would have access to
S. W. 27 Avenue completely eliminated. Motorists would be forced to
detour south to Tigertail Avenue or north to U.S. 1 to travel west.
Detoured traffic would increase traffic volumes on S. W. 22 Avenue and
possibly also S. W. 24 Avenue, Lucaya Street, Calusa Street, Kirk Street,
and Freeman Street. The intersections of U. S. 1 and S. W. 24 Avenue,
and S. W. 22 Avenue and Tigertail Avenue may be subjected to unacceptable
volumes and delays.
We therefore must object to the proposed closing of both S. W. 27 Lane
and S. W. 28 Street. The Departmene, however, would not object to the
closure of S. W. 27 Lane, as shown on your diagram, as long as S. W. 28
Street is left open as a "collector" roadway for resident and emergency
vehicle usage.
WAH/JC/em
Very truly yours,
&Wa1At0A/./Herndon J ., P.E.
Director
Equal Opportunity/Handicap EmployerlSomices 2,
.-
91--- 376
/ CITY OF MIAMI. FLORIDA
INTER -OFFICE MEMORANDUM
TO Donald W. Cather
Director of Public Work
FROM
Pe L. .Anderson, Jr.
Chief .of Police
DATE OCT 2 O 08 FILE
SUBJECT Jefferson Street Closure
REFERENCES.
ENCLOSURES
In response to your inquiry of vehicular access at S.W. 28
Street, I provide' you wi e
Our Department has reviewed your proposal and we oppose the
restriction. The closure would inhibit our Department's ability
to respond in a timely manner to this area, should an emergency
arise.
PLA:blw 6648
91-- 376
6
4..,
CITY OF MIAM1. FLORIDA
INTER -OFFICE MEMORANDUM
To. Mr. Donald W. Cather
Director of Public Works
P.44
FROM!
Lieutenant P. S. Rhodes
Fire Prevention Bureau
O^Tc: May 8, 1987 nu:
suslccT: Prohibition of
Vehicular access
at .Jefferson Street
RCFcacHccs: and S. W. 28 Street
CNCLOSUPcs:
From an emergency response point of view, the Fire Department is
opposed to the elimination of vehicular access to S. W. 28 Street
wand S. W. 26 Avanue. S. W. 28 Street mnst remain open.
It is recommended that vehicular traffic be curtailed on a trial
basis at S. W. 28 Street and Jefferson Street. It is also
recommended that a temporary barrier be installed for a period of
time to determine how the traffic flops.
PSR;lz
Chief R. Be Rehr, Fire Marshal
Chief Lutes
0
zH
9 1 -- 376
A
el
1
To.
FROM
CIYY OF MIAMI, FLORIDA
INTER -OFFICE MEMORANDUM
/ �7oseph A. Inf;raham
(/Director
ent of Solid Waste
P to
Acting u rintendent
of operations
DAM May 8, 1987 M%42
su.JtcTi prohibition of Vehicular
Access Jefferson Street
-at SW 28 Street
R[FtR[NG[�1
[Nc�oaunul
This is in reference to the memo dated April 15, 1987,
from Donald W. Cather, Director of Public Works, relative to
prohibition of vehicular access in the area referenced above.
After investigation was made of the area of SW 28 street
at Jefferson street, the Division of operations does not object
to the proposal of eliminating vehicular access to Jefferson
_.._____Street_at_ 8W_ 28 Street.
We are against the closing of SW 28 street at SW 26 ave m3e.
cc: Bill Mackey, Public Work s/
2� \
91- 376
CITY OF MIAMI, FLORIDA
INTER -OFFICE MEMORANDUM
TO Luis A. Prieto Ph.D., P.E. DATE FEB 4 1391 FILE
Director
Public Works SUEUECT Enforcement "One -Way"
Traffic Regulations
. r _
Along S.W. 28 Street
allFROM cti+"1 S P REFERENCES
ry L. nderson, Jr. �(
Chief of Police L/
ENCLOSURES
The Police Department received and reviewed your memorandum dated
December 19, 1990, regarding the violation of the one-way
restrictions in the Overbrook Road neighborhood. In response to
your memorandum, I offer the following.
Pursuant to your memorandum, the Field Support Section/
Enforcement Detail has monitored traffic along S.W. 28 Street
from 24 Avenue to S.W. 26 Avenue. To date, a total of 52
summonses have been written for violation of the one-way
restrictions.
The Enforcement Detail will continue to monitor this location and
take appropriate action when necessary. If the Police Department
can further assist you, please contact Major Arnold Gibbs,
Commander, Field Support Section, at 579-6181.
PLA:ow
1
A 1�
91-- 376
I
CITY OF MIAMI. FLORIDA
INTER -OFFICE MEMORANDUM
TO Luis A. Prieto-Portar DATE F E B 2 5 291 L:
Director
Public Works Department SUBJECT Permanent Installation
of "One Way" Traffic
Signs
FROMerry L. Anderson, Jr. REFERENCES Overbrook Neighborhood
Chief of Police ENCLOSURES
The Miami Police Department has reviewed the impact of proposed
resolution #90-819 recommending the installation of one-way
traffic regulatory signs to reduce vehicular traffic in the
Overbrook Neighborhood.
It us our recommendation rLoIL to oppose the resolution as it will
not impact on our department's ability to respond in a timely
manner should an emergency occur in the neighborhood.
PLA:blw
91-- 376
I
CITY OF MIAMI, FLORIDA
INTER -OFFICE MEMORANDUM
TO Luis A. Prieto-Portar, Ph. D., p.g!TE. February 13, 1991 FILE
Director of Public Works
SUEUECT One Way Traffic
Signs in the Overbrook
Neighborhood
FROM / / / REFERENCES
/.+�'` Your memo of 2/1/91
C.H. Duke, erector ENCLOSURES
Fire Rescue & Inspection Services
In response to your request for comments regarding the One Way
traffic control plan in the Overbrook Neighborhood, this
department does not foresee any problems with one way streets in
that area. If you have any problems please contact me at the
Fire Chief office.
/cvb
•
^ y
0)
3
F-_E:E _2 1 -'ils 1 WEL 1 a=t :4E. _.C1L I SJ WN!E-TE
CITY OF MIAMI, FLORIDA
INTER -OFFICE MEMORANDUM
TO Luis Prieto -Porter, Director
Public Worka Department
Attni James J. Kay
FpO"' Adrienne M. Macbeth
Deputy Director
Environmental Services Division
DATE
SU&JECT
REFERE14CES
tNCLGSURES
F' _ k7
February 27, 1991 FILE
Permanent Installation of
"One Way" Traffic Signs in
the "Overbrook Neighborhood"
In responec to your February 1, 1991 memorandum regarding the
above subject matter, please be informed that Mr. Peter Joffre,
Chief of Operations, inspected the area and advised me that he
does not have any problem with permanent installation of one way
traffic signs in the Overbrook Neighborhood.
91- 376
.� 9