HomeMy WebLinkAboutR-91-0667-r
WHEREAS, the City Commission adopted Resolution No. 90-486
on June 28, 1990, authorizing, for a ninety (90) day trial
period, temporary barricades and traffic regulatory signs across
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certain streets in the Morningside neighborhood in the City of
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Miami, Florida, In accordance with Plan "B" subject to certain
conditions which have been met; and -
WHEREAS, the Department of Public Works has monitored the
effects of, traffic control Plan "B" and, with the consensus ofa
majority, of the eight (8) designated representatives of the
Morningside neighborhood, has modified traffic control Plan "B",
hereinafter cal -led: "Amended Plan B" , to control undesirable
traffic I.ntruslon and provide adequate access Into the
neighborhood; and
r
0-4-91
667
RESOLUTION NO.
A RESOLUTION, WITH ATTACHMENT, MAKING FINDINGS,
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AND DIRECTING THE PERMANENT PROHIBITION OF
VEHICULAR ACCESS TO CERTAIN STREETS AND URGING
METROPOLITAN DADE COUNTY TO TAKE STEPS WHICH
WILL RESULT IN THE PERMANENT INSTALLATION OF
TRAFFIC SIGNS IN THE MORNINGSIDE NEIGHBORHOOD IN
THE CITY OF MIAMI, FLDA. IN ACCORDANCE WITH
AMENDED PLAN "BPROVIDED THAT THE
CONDITIONS CONTAINED WITHIN THIS RESOLUTION ARE
MET; FURTHER AUTHORIZING THE CITY MANAGER TO
ADVERTISE FOR FORMAL COMPETITIVE SEALED BIDS FOR 4
THE CONSTRUCTION OF THE PERMANENT BARRICADES AND.
AWARD THE CONSTRUCTION CONTRACT(S) TO THE LOWEST -
RESPONSIBLE AND RESPONSIVE BIDDER OR TO DIRECT s
THE PUBLIC WORKS DEPARTMENT FORCES AND PERSONNEL
TO CONSTRUCT THE PERMANENT BARRICADES UPON
RECEIPT OF THE THIRTY EIGHT THOUSAND SIX HUNDRED
DOLLAR ($38,600) CASHIER'S CHECK FROM THE
RESIDENTS OF THE MORNINGSIDE NEIGHBORHOOD.
WHEREAS, a group of property owners has requested that the
City restrict vehicular access to certain streets within the
Morningside neighborhood; and
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WHEREAS, the Pol-lce Department, ;:Fire, Rescue and 'inspection
Services Department, General Services Administration/Solld Waste
Department and Metropolitan Dade County Public :Works Department
j
have evaluated the effects of the vehicular access restrict'lon
upon their respective operations duringthe trial aper- I od. and have
expressed no substantial objections to the permanent restriction
of vehicular access to the aforesaid streets provided that access
4.
for emergency vehicles be allowed at all times; and
G ATT CH M 1:
1� Amended Plan "S" Is att r NotereTcl,
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(b) the design of the barricades Will be
accomplished by the Public Works Department and
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shai'i be approved by the(re; Rescue and
Inspection Services Department and the Poi1Ce
Department;
(c) all of the barricades shall be installed by
licensed contractors retained by the Public
Works Department or by Public Works Department
foroes and_, personnel after posting of the
cashier's check, as set forth in Paragraph (a)
above;
(d) all mohles posted by the residents not utilized
In the design and construction of the
aforementioned Barricades shall be returned to
the :residents.
Sectlon,3. Metropolitan Dade County Is hereby urged to
take steps which will result in permanent Installation of traffic
regulatory signs, in accordance with Amended Plan "B", in the
Morningside neighborhood In the City of Miami, Florida.
Sectlon 4., The,; City Manager Is hereby authorized to
advertise for formal competitive sealed bids for the construction
of. the permanent barricades and award the contract(s) to the
lowest responsible and responsive bidder or to direct Public
Works Department.forces 'and'pe'rsonnei to construct the permanent
barricades upon receipt of the thirty eight thousand six hundred
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dollar ($38,600) cashier's check from the residents of the.
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MorrtJngslde Neighborhood.
Section 6. In the event that the residents do not post the
required cashier's check within one hundred and twenty (120) days
from the date of this Resolution, the authority and permission
granted by this Resolution shall be rescinded automatically and.
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without further action by the City Commission.
Section B. This Resolution shall become effeGtl+B
immediately upon Its adoption.
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have bee
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Cit.�''I:e �'.,
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below LOS B under anN,
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RECOMMENDATIONS,
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�:,r an y:. _system em o f closures
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er'section at N.E. 50th Tarr-ac
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ot operate. below LOS C u-nde'r any 0
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R. E.,,.-61st.. Street: anc
brl-Y in any system that
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ATT, remal ni ng,: movements (right turns
movements) operate'at middle to
high
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city OP MIAMI, PLOW.
INTER -OFFICE MEMORANDUM
Me May
or yor eAUG1991 k�LE
Honorable I r!3andaMembers BATE of the ' 0 I ty 'Cotrurf i ss I bn
sua,ECt . Veh I cu 1 ar Access Restr I Ct i oms
to the Morningalde Neighborhood
( FROM : REFERENCES : c
Cesar H Od i
E City Manager ENCLbtuREs : Rest! I ut I on, I.Ocht l on Map
and Traffic Ana I ys"I s w
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RECOMMENDATION:
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It Is respectfully recommended that the City Commission adopt ,
the attached resolution authorizing the permanent restriction of,
vehicular access to streets within the Morningslde Neighborhood
and i dent Ify I ng a method of funding their Installation.
BACKGROUND:
On July 21, 1989 a group of citizens from the, Morningslde
neighborhood, bounded by N.E, 50 Terrace,: N.E. 60 Street,
Biscayne Boulevard and Biscayne Bay, submitted a pets-tion to the
City Manager .and Department of Public Works requesting that
vehicular access be restricted to many of the streets serving
the Morningslde neighborhood. from Biscayne Boulevard.. The
citlzees' request for vehicular access restrictions at these
locations i s � : I n response to the- Increasing need to control and
prevent undesirable activities adjacent to and within their
neighborhood and a desire to maintain the "character ofthe
neighborhood.
a " At the October 26, 1989 meeting, the C I ty: Comm I ss Von. • adopt;ed
'j Motion 89-995 Instructing, the Public Works., Department to meet
<< wl.th eight (8) representatives from.the.Morn)ngsi'de neighporhood
to -develop a traffic control plan to control undesIrabie.;traf;f,,IC
intrusion Into, the Morn.ingsIde neighborhood. The. eight (8) :
■' °ne19 hborhood.: representat Ives- selected 'for._ the traffic. study
committee represent the neighborhood`groups both for and against
j barricades. In addition, the Public Works Department retained
the servlces,of s professional traffic engineering consuitang to
j prepare a traffic analysis of all vehicular access restriction}
proposals.
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Page 1 of 2
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ATLer eXLa"51 VC1y 06%awy 1tsd r.ry �..... ��. ��. ..� �' -••-
neighborhood, consulting the various traffic counts and
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considering the recommendations contained In the traffic
englneerIhQ consultant report, a neighborhood traffic control
plan was prepared by the Public Works Department and the
;
neighborhood traffic study .committee. Resolution No. 90-438
approving the Implementatlon of traffic Control Plan "B" orl`a
trial basis was adopted by the City Commission on June 28, 1090,
During the trial period, the neighborhood traffic study
committee, working with the Public Works Department End
neighborhood residents further refined the .temporliry traffic
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control Plan 11811 In accordance with the professional traffic
analysis. The Public Works Department conducted a neighborhood
meeting on June 13, 1991 to Inform all residents of the
Morningside neighborhood of the Committee's proposed plan and
solicited each residents opinion of the final plan by mailing a
postage paid, self addressed post card ballot to each resident.
The results of the ballot are as follows (as of August 6, 1991):
185 In Favor of Amended Plan "B"As
88 Against Amended Plan "B"
t
5 No Opinion
152 Did Not Respond
The Fire Department's, Police Department's and Solid Waste
Division's recommendations of the Amended Plan "B" will be
presented at the September 11, 1991 meeting as well as a final
tally of the ballots.
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In accordance with recent Commission policy,' the City of Miami
i
will not fund closures for neighborhood streets. If any traffic
control measures are adopted by the City Commission, a method of
financing their construction and maintenance must be identified,
which could Include voluntary ,.contributions by Interested
property owners. The total cost -.of permanent barricade north of
N E. 55 Terrace is estimated to b6 $4',600 each and south of N.E.
55 Terrace Is estimated to be, $3,900 each for a total of
.
$38,600.
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Page 2 of 2
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CITY O MIAMI
.rl" A r'�r"l f'ii i-N A T3 A F;q' A ki A I VIZI 4Z
MORNINGSIDE RESIDENTIAL AREA
TI"VTTHAND s CHNARS1 PeA
ENGINEERS -PLANNERS -SURVEYORS
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MORNINOSIDE RESIDENTIAL AREA
FOR
THE CITY OF MIAMI
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APRIL, 1990
PROJECT NO. 13366.10
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PREPARED BY•
KEITH AND SCHNARS, P.A.
8880 N.W. 20TH .STREET, 'SUITE A:
MIAMI, FLORIDA'33172
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INTRODUCTION
The City of Miami has retained Keith and Schnars to perform a
Traffic Study to determine the feasibility and' impact of ` ee�4rai
patterns of side street closures along Biscayne Boulevard
in the Morningside area'. The study area is bounded by Northeast
50th Terrace on the south, Northeast 61st Street on the north,
Biscayne Boulevard on the west and Biscayne Bay on the east.' The
focus of this study is primarily on the traffic issues and th'e ;
1
effect of street closures on the operatiori of Biscayne Boulevard'.
It does not address issues concerning access for public services
.and emergency services.
PROCEDURE
Traffic counts for several of the side streets were acquired from
the Dade County Department of Public Works. These data were
collected in September and December 1989. From these data, it was
determined that the heaviest traffic is during the PM peak. To
establish PM peak,hour travel patterns, turning movement counts
.were taken at selected side streets and at each signalized `side
street along Biscayne Boulevard i.n the study area. These data were
collected in February 1990. Information about the operation of the'
signals was obtained from the Dade County Traffic Control System
computer. Intersection geometries and sign control were noted in
the -field. All of this count andsystem information' was used `toy .
analyze the various alternative networks.
- METHODOLOGY
To determine the operating characteristics, each alternative_iet-;'
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work was simulated using the TransRel"ease 6''model (T7F).:
T7F Y is.a computer program that can be used to determine 'how wel:1;
a system of intersections works. Its output gives'severa1':measures` .
of effectiveness (MOE's) about the system. the MOE of interest :in
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this study is the v/c ratio. This is the ratio of Volume (v) of
vehicles on the road to the actual capacity (c) of the roan. For
purposes of this study a v/c above 0.9 indicated a critical inter-
section, The critical intersections were studied further using the
—
Highwgy capacity Manual (HCM) techniques. the HCM preaents a
method of analyzing intersections independently, and it attaches
a qualitative measure of effectiveness called level of service
(LOS) to the various movements at the intersection. This LOS is
based on delay and v/c ratios: A high level of service LOS A or
8, indicates very little delay and low v/c ratios. A low level o
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service LOS F, indicates poor operation with long delays and v/c
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ratios sometimes exceeding 1.0. Typically, the lowest acceptable
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level of service is LOS D. However, due to the constrained right-
of-way and high density development along Biscayne Boulevard, the
LOS E is considered acceptable by local planning agencies.
ANALYSIS
Alternate 1 - Existing Network
Description The existing network is one in which all side streets
j
are open. There are traffic signals at N.E. 50th Terrace, N.E.
54th Street and N.E. 61st Street on Biscayne Boulevard. At N.E.
55th Street, N.E. 55th Terrace.and N.E. 56th Street vehicles are
permitted to turn right off of and on to Biscayne.Boulevard but.
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not left. This network is depicted in Figure 1.
ResultsInternal to the neighborhood, all intersections operate.
at LOS A or B. The only drivers that experience difficulty are,
,
those turning left on to Biscayne Boulevard from the side streets.
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The heavy traffic .on Biscayne Boulevard provides few opportunities
for vehicles to turn left. The long delays experienced by. the left
turning traffic correspond to LOS E. This is a low level of ser-
vice, but.,it is acceptable. Also the intersections are fa,ir.Iy
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insensitive to the number of left turns. According to analysis'
using HCM methods any number of left turns from 1 to '40 experie'ncos
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LOS E. '.
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Figure
i. AIternative 1:
[KITH and SCHNAIM.PA,
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Exl st I ng Network tNo Cl osures
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Alternate 2 Maximum Closures
debcr.iotion A network with maximum closures allows the two
existing signalized , -intersections providing accees to the neighbor!
hood, N.E. Both Terrace at Biscayne Boulevard and N.E. 6iat Street
at Biscayne Boulevard, to remain open. All other side streets are
closed with full closures. This network is depicted in Figure Z:.'
Results Under this scenario,*all internal intersections operate ¢_
at a high level of service (LOS A or B), and the intersection of
N.E. Both Terrace and Biscayne Boulevard is not significantly+
impacted, However, this scenario causes the southbound left turns Y
at the intersection of N.E. 61st Street and Biscayne Boulevard to
fail. The left turns experience LOS F because there are not enough
opportunities for the traffic to turn left across the heavy north-
bound traffic. This problem can be avoided to some extent if a
a left turn arrow is provided, but the green time it "steals" from
other movements forces them to operate at LOS E/F. However:,
another type of capacity problem, exists that the leftturn arrow
does not help; the left turn lane is too short to accommodate the
B
increased traffic. This can cause cars to block the southbound
s through,lane.forcing it to operate at-LOS F.
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The lack of queue storage is the critical factor
q g for at this inter-
section. .
The storage bay cannot be lengthened because.of the
i intersection's proximity to the intersection at N.E. 62nd Street
I
and Biscayne Boulevard. This means that to relieve problems that
develop with the southbound lefts, more opportunities to access ,the r
network must be provided in the north portion of the study area. j i 4{
i No additional left turn openings are required along Biscayne
Boulevard south of N.E. 56th Street.
1j Alternate`3 One Unsignalized Opening
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Degcri oti on ,In this scenario all side stee.ets, are. c l osed except t :
one _ in the northern half of the study area and the two exi sti t1g
signalized openings. N.E. 5th Avenue is chosen 'because it Can',`
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Mrsect
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LProposed
Closure
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F i gu re A. A) t e r nor t I v e 3;�
KEITN and SCtiN11RS. P,A.
One 'Open fn g t S I gn Controls
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Figure 6. Alter-notI.e 4;
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3KEITH aad AR5,P A
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_Two Openings %Sign Controll
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NE 61st Street
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and a LOS <.
under :alter`-
pCt IVe°=�`�
(�4 Dt Ex�s.tlnq
LB�une and
F1;qure. 7,:' Operat,aon. of �NE 6Lst
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Street at "BIsca.yne BI'vd.
Exlstinq Alt°erjm�nate
KEiTH,aad SC
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o the existing signali2ed intersections should remain open
c At least two streets providing scuthbound loft turns aff of
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Biscayne Boulevard between N.E. 87th Street and N.S. loth
Street$ inclusive, thou.ld remain open.
An additional signalized intersection is not recommended. A47
detailed engineering study of the proposed intersection location
would be required before a recommendation could be made, It should
be noted that preliminary data indicate that a signal cannot be
justified.
In addition to the recommendations above, the following should be
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considered.:
o ..Address issues of emergency and public service access,
o Provide access to public land, i.e., Morningside Park via NE.
55th Terrace.
o Certain streets if left open may require improvements to
safely accommodate increased two way traffic. For example,
increased traff i c f l ow on N. E. 5th Avenue would require resur-
facing, 'proper markings, and _preferabl
9 Y Pavement 'widening .
These factors may have a stronger.impact on the decision of which
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streets to close than the traffic issues:
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After providing access to the north portion of the study area and
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allowing the public access and service and emergency access; there.-
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is a variety of patterns of closures and`` half closures. that can be
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accommodated 'to suit the needs of the City and the citizens of the
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Morningside Neighborhood`:
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