Agenda 12/16/2008 Item #16B 3
Agenda Item No, 1683
December 16, 2008
Page 1 of 6
EXECUTIVE SUMMARY
Recommendation to approve a Resolution to reduce the speed limit on Oakes Boulevard
between Vanderbilt Beach Road and Immokalee Road from the current speed limit of forty-
five miles per hour (45 mph) to thirty-five miles per hour (35 mph)
OBJECTIVE: That the Board of County Commissioners approve a Resolution to reduce the
speed limit on Oakes Boulevard from the current posting of forty-five miles per hour (45 mph)
to thirty-five miles per hour (35 mph),
CONSIDERATIONS: Upon the request of local residents, the Collier County Traffic
Operations Department has conducted a traffic engineering study to determine the appropriate
speed limits on the referenced roadway. Oakes Boulevard is a collector road, recently restricted
from truck traffic, passing through a residential neighborhood with eight local streets and
numerous private driveways intersecting it. The existing speed limit is 45 mph.
The road is two-lane, two-way with a double yellow center line denoting "NO PASSING" for its
entire length. Only one intersection at Spanish Oaks has left-turn lanes that would allow vehicles
protection while waiting to turn. Crash history shows the roadway experiencing 24 crashes
within the past three years, with half of them being rear-end collisions.
Given the roadway geometry and the nature of a residential neighborhood, it is recommended
that the speed limit be reduced to 35 mph,
FISCAL IMPACT: The estimated cost to change the existing speed limit signs from 45 to 35
on the referenced roads is approximately $400. Funds are budgeted in the Traffic Operations
Department Operating Fund 101.
LEGAL CONSIDERATIONS: This item has been reviewed and approved by the County
Attorney's Office, is not quasi-judicial and requires no ex parte disclosure, requires only a
majority vote for approval, and is otheIWise legally sufficient for Board action.-SRT
GROWTH MANAGEMENT IMPACT: There is no Growth Management Impact associated
with this Resolution.
RECOMMENDA TION: That the Board of County Commissioners approve the Resolution to
reduce the speed limit on Oakes Boulevard between VanderbiJt Beach Road and Immokalee
Road from the current speed limit of forty-five miles per hour (45 mph) to thirty-five miles per hour (35
mph); authorize the Chairman to execute the Resolution, and authorize the County Manager or his
designee to erect the appropriate traffic control signage,
Prepared By: Robert W, Tipton, P,E., PTOE, Traffic Operations Director
Attachments: (I) Resolution; (2) Tramc Engineering Study
Item Number:
Item Summary:
Meeting Date:
Page I of I
Agenda Item No, 1683
December 16, 2008
Page 2 of 6
COLLIER COUNTY
BOARD OF COUNTY COMMISSIONERS
16B3
Recommendation to approve a Resolution to reduce the speed limit on Oakes Boulevard
between Vanderbilt Beach Road and Immokalee Road from the current speed limit of forty.
five miles per hour (45 MPH) to thirty-five miles per hour (35 MPH).
12/16/20089:0000 AM
Prepared By
Traffic Operations Director
Date
Robert W. Tipton, P .E.
Transportation Services
Traffic Operations
11125/20086:07:19 PM
Approved By
Robert W. Tipton, P.E.
Transportation Services
Traffic Operations Director
Traffic Operations
Date
11/25120086:06 PM
Approved By
Brian Hancock
Transportation Division
Operations Support Manager
Transportation Administration
Date
11126/200811:45AM
Approved By
Barbara LaPierre
Transportation Services
ManagemenUBudget Analyst
Traffic Operations
Date
1211120081:29 PM
Approved By
Scott R. Teach
County Attorney
Assistant County Attorney
County Attorney Office
Date
1212/20088:03 AM
Approved By
Norm E, Feder, AICP
Transportation Services
Transportation Division Administrator
Date
Transportation Services Admin.
12121200810:49 AM
Approved By
Pat Lehnhard
Transportation Services
Executive Secretary
Transportation Services Admin
Date
121212008 1 :07 PM
Approved By
OMS Coordinator
Administrative Services
Applications Analyst
Information Technology
Date
1212/20083:59 PM
Appro'ved By
Mark Isackson
County Manager's Office
Budget Analyst
Offfce of Management & Budget
Date
12/2120085:48 PM
Approved By
James V. Mudd
Board of County
Commissioners
County Manager
Date
County Manager's Office
12/812008 9:58 PM
file://C:IAgendaTestIExportII18-December%20 16, %2020081] 6.%20CONSENT%20AGE...
] 2/1 0/2008
Agenda Item No, 1663
December 16, 2008
Page 3 of6
RESOLUTION NO. 2008-
A RESOLUTION BY THE BOARD OF COUNTY COMMISSIONERS OF
COLLIER COlINTY, FLORIDA, AUTHORIZING ^ SPEED LIMIT
REDUCTION ON OAKES I101lLEVAIUl FIWM FORTY-FIVE MILES
I'ER 1I011R (45 MPII) TO THIRTY-FIVE MILES I'ER 1I0UR (35 MI'H)
WI...:REAS, Chapter 316, norida Statutcs, pcrmits lhe Board of County Commissioners (Bee)
to alter estahlished speed limits on roads under its jurisdicl ion; and
'WHEREAS. Oakes Boulevard filils undcr Ihe jurisdiction of the BCe: and
",rHEREAS. in accordance with S""tion 316, Florida Statutes, the BCe may alter such existing
spced limits as may be appropriate upon the ba,j, of an cngineering ill1d trallie investigation: and
WHEREAS, the results of such cllginecring and tranie investigations indicate that the reduced
.'peed limit is rcast>nable and safer under the conditions found to cxis!.
NOW, THICRU'ORE, BE IT RESOLVED BY THE BOARtl OF COUNTY
COMMTSSIONf.RS Of' COLUEH COUNTY, FLORJDA,that:
(1) The Bec does hereby establish a thirty-five miles per hour (35 MI'B) speed limit on
Oakes Boulevard, and does hereby direct the County Manager or his designee to ert",t appropriate speed
limit signs giving notice tl,ereof,
(2j A copy of this Resolution ,hall he forwarded to the Collicr County Sheriffs Onice tor
proper enforcement of the established speed limit., fi)r Oakes Boulevard.
(3) The cJT"ctive date of the speed limit reduction shall be after written notification to the
Shcrifrs Office and upon the po~ting of appropriate signage.
This Resolution adopted after motion, second, and majority vote favoring slime this _lh day of
December, 2008.
Agenda Item No, 1683
December 16, 2008
Page 4 of 6
ArrEST:
DWIGI IT E. BROCK. Clerk
BOARD OF COUNTY COMMISSIONERS
COLLIER COUNTY. FLORIDA
BY:
D~pllty Clerk
BY:
Tom I-lenning, Chairman
APpro~~o ~T:d Ie/SUfficiency:
BY: cs-c)f 7 ~i.4")
Scott R. Teach
Deputy County Attorney
Agenda Item No, 16B3
December 16, 2008
Page 5 of 6
Speed Limit Study Report
Oaks Boulevard
Robert W, Tipton, PE, PTOE,
Traffic Operations Director
Date: November 13, 2008
BACKGROUND
Responding to a request from the neighborhood residents, the Collier County Traffic
Operations Department has conducted an engineering and traffic investigation study to
determine the appropriate speed limit on Oaks Boulevard.
The primary purpose in the establishment of a speed zone is to provide improved
vehicular and pedestrian safety by reducing the probability and severity of crashes. An
established speed limit notifies the driver of the maximum speed that is considered
acceptably safe for optimum weather, visibility, and traffic conditions, It is intended to
establish the maximum speed limit at which the normal prudent driver can respond safely
to driving problems encountered on the roadway.
Oaks Boulevard is a two- way, two-lane connector road connecting Vanderbilt Beach
Road on the south and Immokalee Road on the north. Its existing posted speed limit is 45
MPH in both directions.
CRASH HISTORIES
A crash history review of the entire roadway segment for the past three years (2005-
2007) has been conducted. In the 3-year period, there were a total of 24 crashes
recorded-5 turning related crashes, 3 hit fixed object crashes, I side swipe, 3 run- off-
road, and 12 rear-end crashes. Some of the crashes appear speed related.
SPERD INVRSTlGATlON
Florida Statutes require that the change of speed zone values as outlined in Sections
3 I 6, 183 and 316, I 89 F.S. be based upon an engineering and traffic investigation. The
investigation is to include, but is not limited to, the measurements of prevailing speeds
and other traffic engineering evaluations contained in the "Speed Zoning for Highways,
Roads and Streets in Florida" manual (FDOT Manual Number 750-010-002, 1997
Edition). This manual was developed by the Florida Department of Transportation to
promote uniformity in the establishment of state, municipal and county speed zones
throughout the State of Florida.
Three types of data were utilized in detennining the prevailing speed: 85th percentile
speed - the speed at which 85% of the motorists drive at or below, the upper limit of the
10-mph pace, and the average test run speed. The reasoning behind the foregoing
investigations is that the majority of drivers travel at a perceived reasonably safe speed
Agenda Item No, 1683
December 16, 2008
Page 6 of6
for the various roadway conditions encountered, and that these investigations help
determine what may be reasonable speed limits.
Prevailing vehicle speeds were measured during free-flow traffic conditions on July21,
2008. The following data were collected:
Location: Oaks Boulevard@ 14th Avenue N.W.
85th percentile speed: Southbound = 47 mph
Northbound = 46 mph
1 O-mph pace: Both Southbound and Northbound = 38 mph - 48 mph
Field test run speed = 40 mph
ANAI,YSIS
According to the above referenced speed zoning guidelines, a speed limit should not
typically differ from the 85th percentile speed or upper limit of the 10-mph pace by more
than 3 mph and it should not be less than 8 mph.
Based purely upon the guidelines, the measured 85th percentile speed of 47 mph on
southbound and 46 mph on northbound, as well as the 1 O-mph pace of 38-48 mph on
both directions will yield a 40 or 45 mph speed limit. However, given the roadway's
crash history and the fact that the road runs entirely within a residential neighborhood
with driveways, it is more appropriate to set a 35 mph speed limit for the road.
RECOMMENDA nON
Based on the collected speed data, the crash history, the surroundings of the road
(residential neighborhood), and the speed limit setting guidelines, it is recommended that
the speed limit on Oaks Boulevard may be reduced to 35 mph.
2