Agenda 09/13/2011 Item #16A189/13/2011 Item 16.A.18
EXMCUTIVE SUMMARY
Recommendation to, accept a Speed Limit Study Report and adopt a Resolution of the Board of
County Commissioners of Collier County, Florida, establishing a speed limit of thirty -five miles per
hour (35 mph)'for the currently non - posted speed limit section of roadway of Bailey Lane from
Coco Lakes Drive east to Airport - Pulling Road at a cost of approximately $400.
QWCTIVE: To request the Board to accept a Speed Limit Study Report and adopt a
Resolution of the Board of County Commissioners (BCC) to establish the speed limit on the non-
posted speed limit section of roadway of Bailey Lane from Coco Lakes Drive east to Airport-
Pulling Road.
CONSIDERATIONS: The Traffic Operations Section of the Transportation Engineering
Department, Growth Management Division conducted an engineering and traffic investigation
study to determine the appropriate ,speed limit on Bailey Lane from Coco Lakes Drive east to
Airport- Pulling Road. The study segment is a twenty -foot wide paved local street without curb
and gutter and shallow swales and no sidewalk. The segment is approximately 1850 feet long
with no posted speed limit.
Florida Statutes require that the speed_ zone values as outlined in Sections 316.183 and 316.189
be based upon an engineering and traffic investigation study. 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.
Upon completing an engineering and traffic investigation study, Section 316.189 F.S. provides
that the Board of County Commissioners may set speed zones after the investigation determines
the speed is reasonable and in conformity to criteria promulgated by the Florida Department of
Transportation.
The completed engineering and traffic investigation study found that a speed limit of 35 mph on
the designated section of Bailey Lane from Coco Lakes Drive east to Airport- Pulling Road is
warranted; and that the speed is reasonable and in conformity with the defined criteria. The
Sheriffs 'Office was contacted regarding the recommendation to establish a speed limit and the
Sheriff s Office concurs with the recommendations of the engineering and traffic investigation
study.
FISCAL IMPACT:' The estimated cost of installing the 35 mph speed limit signs will be
approximately $400.00 and is budgeted with the Traffic Operations budget Fund 101.
LEGAL CONSIDERATIONS: This item has been reviewed and approved by the County
Attorney's Office and is legally sufficient for Board action. —SRT
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9/13/2011 Item. 16.A. 18.
n GROWTH MANAGEMENT IMPACT: This action will result in no growth management
impact.
RECOMMENDATION: That the Board of County Commissioners accept the Traffic Speed
Limit Study and adopt the Resolution establishing the speed limit on the designated section of
Bailey Lane, authorize the Chairman to execute the Resolution, and authorize the County
Manager to erect the appropriate traffic control signs.
Prepared By: Eugene Calvert, PE, PTOE, Principal Project Manager, Traffic Engineering
Department, Growth Management Division- Capital Construction and Maintenance
Attachments: (1) Resolution; (2) Speed Limit Study Report
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9/13/2011 Item 16.A.18.
COLLIER COUNTY
Board of County Commissioners
Item Number: 16.A.18.
Item Summary: Recommendation to accept a Speed Limit Study Report and adopt a
Resolution of the Board of County Commissioners of Collier County, Florida, establishing a
speed limit of thirty -five miles per hour (35 mph) for the currently non - posted speed limit
section of roadway of Bailey Lane from Coco Lakes Drive east to Airport- Pulling Road at a cost
of approximately $400.
Meeting Date: 9/13/2011
Prepared By
Name: LynchDiane
Title: Administrative Assistant
8/18/20113:12:19 PM
Submitted by
Title: Project Manager, Principal,Transportation Engineering & Construction Management
Name: CalvertEugene
8/18/2011 3:12:20 PM
Approved By
Name: Tara Castillo
Title: Fiscal Technician,Transportation Engineering & Con
Date: 8/18/20114:34:19 PM
Name: CalvertEugene
Title: Project Manager, Prineipal,Transportation Engineering & Construction.Management
Date: 8/22/20118:29:53 AM
Name: BetancurNatali
Title: Executive Secretary ,Transportation Engineering•& C
Date: 8/22/2011 1:29:13 PM
�1 Name: KhawajaAnthony
Title: Engineer- Traffic Operations,Transportation Engineering & Construction Management
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9/13/2011 Item 16.A.18.
Date: 8/23/20117:57:18 AM
Name: AhmadJay
Title: Director - Transportation Engineering,Transportation Engineering & Construction Management
Date: 8/23/20119:13:17 AM
Name: FederNorman
Title: Administrator - Growth Management Div,Transportati
Date: 8/23/20119:28:39 AM
Name: TeachScott
Title: Deputy County Attomey,County Attorney
Date: 8/23/20115:25:31 PM
Name: MarcellaJeanne
Title: Executive Secretary,Transportation Planning
Date: 8/25/20118:14:07 AM
Name: KlatzkowJeff
Title: County Attorney,
Date: 8/25/20.11.3:23:29 PM
n Name:IsacksonMark
Title: Director -Corp Financial and Mgmt Svs,CMO
Date: 9/2/20119:26:03 AM
Name: KlatzkowJeif
Title: County Attorney,
Date: 9/2/20112:30:17 PM .
Name: IsacksonMark
Title: Director -Corp Financial and Mgmt Svs,CMO
Date: 9/2/20113:39:53 PM
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9/13/2011 Item 16.A.18.
RESOLUTION NO. 2011 -
A RESOLUTION OF THE BOARD OF COUNTY COMMISSIONERS OF COLLIER
COUNTY, . FLORIDA, ESTABLISHING A SPEED LIMIT OF 35 MILES PER HOUR (35
MPH) FOR THE CURRENTLY NON- POSTED SPEED LIMIT SECTION OF
ROADWAY OF BAILEY LANE FROM COCO LAKES DRIVE EAST TO AIRPORT -
PULLING ROAD.
WHEREAS, Chapter 316, Florida Statutes, permits the Board of County
Commissioners (BCC) to establish speed limits on roads under its jurisdiction; and
WHEREAS, Bailey Lane falls under the jurisdiction of the BCC; and
WHEREAS, in accordance with Section 316, Florida Statutes, the BCC may
establish speed limits on its roadways as may be appropriate upon the basis of an
engineering and traffic investigation; and
WHEREAS, the results of such engineering and traffic investigations determined
that the proposed speed limit is reasonable and safe under the conditions found to exist
and it conforms to criteria promulgated by the Florida Department of Transportation and
Collier County.
NOW, THEREFORE, BE IT RESOLVED BY THE BOARD OF COUNTY
COMMISSIONERS OF COLLIER COUNTY, FLORIDA, that:
1. The BCC does hereby establish a 35 miles per hour (35 mph) speed limit on
Bailey Lane from Coco Lakes Drive east to Airport- Pulling Road and does hereby direct
the County Manager or his designee to erect appropriate speed limit signs giving notice
thereof.
2. A copy of this Resolution shall be forwarded to the Collier County Sheriff's Office
for proper enforcement of the established speed limits for Bailey Lane within the
designated segment.
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9/13/2011 Item 16.A.18.
3. The effective date of the speed limit increase shall be after written notification to /I--,
the Sheriffs Office and upon posting of the appropriate signage.
This resolution adopted after motion, second, and majority vote favoring same
this 13th day of September, 2011.
ATTEST:
DWIGHT E. BROCK, Clerk
M
Deputy Clerk
BOARD OF COUNTY COMMISSIONERS,
COLLIER COUNTY, FLORIDA.
By:
Fred W. Coyle, Chairman
Approved as to form and legal ency
By: 5�
Scott R. Teach
Deputy County Attorney
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9/13/2011 Item 16.A.18.
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Speed Limit Study Report
Bailey Lane
July 28, 2011
By
Eugene Calvert, PE, PTOE
Responding to an external request, Collier County Traffic Operations has conducted an
engineering and traffic investigation study to determine the appropriate speed limit on
Bailey Lane from Coco Lakes Drive east to Airport- Pulling Road (CR 31).
The primary purpose in the establishment of a speed zone is to improve vehicular and
pedestrian safety by reducing the probability and severity of crashes. A speed limit
notifies the driver of the maximum operating speed that is considered reasonably safe in
optimum weather and visibility condition. It is intended to establish the speed limit
which a normally prudent driver can perceive and react safely to driving problems
encountered on the roadway.
Figure 1
Vicinity Map
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9/13/2011 Item 16.A.18.
The establishment and any alteration and posting of speed limits on county streets and
roads, as set forth in Section 316.189, F.S., must be based on an engineering and traffic
investigation that determines such a posting is reasonable and in conformity to criteria
promulgated by the Florida Department of Transportation (FDOT).
Bailey Lane is a two lane paved roadway functionally classified as a Local Street,
connecting Airport Pulling Road (CR 31) on the cast to a Montebello development on the
west. The western most 500 feet of Bailey Lane is within the Montebello and is a private
roadway and is not part of this scgmcnt study. The segment of the roadway in this study
is a county maintained roadway approximately 1850 feet (0.35 miles) in length. The
study roadway segment is a rural section without curb and gutter and has a total paved
width of 20 feet. There are 3 intersecting streets within the study limits. There is no
overhead street lighting for the roadway except at the intersections of Airport Pulling
Road. There are no sidewalks adjacent to the roadway. The roadway does not have a
posted speed limit.
Figure 2
Bailey Lane looking west from Airport Pulling Road
The roadway does not have centerline pavement markings and there are no
sidewalks/pathways along the roadway. The clear zone along the study segment is
typically 16 feet from the edge of the travel way.
The primary land use along the roadway is primarily rural residential, however it is not
within a residential district as defined by Florida State Statutes. The average daily traffic
2
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9/13/2011 Item 16.A.18.
(ADT) is 299 vehicles. This study is to evaluate what the appropriate speed limit for the
study segment of the roadway.
DESIGN CHARACTERISTICS
Section 336.045 of the Florida Statutes requires that the "Manual of Uniform Minimum
Standards for Design, Construction and Maintenance for Streets and Highways" also
known as the Green Book, be utilized for all public roads in the state unless a
municipality or county has adopted other criteria. Collier County utilizes this manual for
all of the roads in its highway network. The standards within the manual are intended to
provide basic guidance for developing and maintaining a highway system with
reasonable operating characteristics and minimum number of hazards. The manual states
that the safety characteristics of the design should be given primary consideration.
The following table (Table 3 -12) is from the 2007 Florida Green Book.
FLORIDA GREEN BOOK
TABLE 3 —12
MINIMUM WIDTH OF CLEAR ZONE
From face of curb
On projects where the 4 foot minimum offset cannot be reasonably obtained and other
alternatives are doomed impractical. the mlrwnum may be reduced b i %s'.
Use mxal for urban facdits, when no mA and gutter is present. Measured from the edge of
fhraugh travel Ism en nrral sodk n.
•• Curb and gutW not to be used on facdities with design speed > 45mph_
Roadside clear zones provide an area outside the traveled way that can be used by drivers
of errant vehicles to regain control of their vehicle and to avoid or reduce the
consequences of a collision with a roadside object. The minimum required width of a
clear zone is dependent upon the type of roadway and its design speed.
Table 3 -12 defines the minimum distance from the travel way to a roadside object such as
a light pole or a tree. Highways without curb and gutter are generally considered to be
rural highways. For rural highways with a design speed up to 50 mph with less than 1500
ADT, the minimum clear zone distance is 14 feet. Based upon the clear zone distance
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Roadside clear zones provide an area outside the traveled way that can be used by drivers
of errant vehicles to regain control of their vehicle and to avoid or reduce the
consequences of a collision with a roadside object. The minimum required width of a
clear zone is dependent upon the type of roadway and its design speed.
Table 3 -12 defines the minimum distance from the travel way to a roadside object such as
a light pole or a tree. Highways without curb and gutter are generally considered to be
rural highways. For rural highways with a design speed up to 50 mph with less than 1500
ADT, the minimum clear zone distance is 14 feet. Based upon the clear zone distance
Packet Page -1771-
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9/13/2011 Item 16.A.18.
along Bailey Lane, the appropriate speed limit for Bailey Lane in the study segment
would be up to 50 mph unless other mitigating circumstances exist.
A crash history review of the roadway segment for the past six years (2005 -2010) has
been conducted. There have been no reported crashes during the six year period on the
0.35 mile study corridor
Florida Statutes require that the change of speed zone values as outlined in Sections
316.183 and 316.189 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 determining the prevailing speed: 85`h percentile
speed — the speed 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 reasonably safe speed for the various
roadway conditions encountered, and that these investigations help determine what may
be reasonable speed limits.
A speed study was conducted on July 19, 2011. The following data were collected:
Location: Bailey Lane approximately 800 feet west of Airport Pulling Road.
85'h percentile speed: 42.2 mph
10 -mph pace speed: 28.9 mph — 38.9 mph
Field test run speed = 35 mph
According to the above referenced FDOT speed zoning guidelines, a speed limit should
not typically differ from the 85'h percentile speed or upper limit of the 10 -mph pace by
more than 3 mph and it should not be less than 8 mph. A speed limit of 4 to 8 mph less
than the 85s' percentile speed shall be supported by a supplemental investigation, which
identifies the following:
• There are road or roadside features not readily obvious to the normally prudent
driver, such as length of section, alignment, roadway width, surface condition,
sight distance, traffic volume, crash experience, maximum comfortable speed in
curves, side friction (roadside development), signal progression, etc.
4
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9/13/2011 Item 16.A.18.
Based on the guideline, the measured 85* percentile speed of 42.2 mph, as well as the W-
mph pace speed of 28.9 — 38.9 mph would normally yield a 40 mph speed limit.
However, the relatively narrow roadway width of twenty (20) feet and the lack of
sidewalks are roadside features that may not be readily obvious to the normally prudent
driver. Therefore it is appropriate to set a 35 mph speed limit for this segment of the
road. Field vehicle test runs also indicated that 35 mph is safe and comfortable speed to
travel on the subject roadway segment. A 35 mph speed limit is in compliance with the
FDOT speed zoning guidelines.
RECOMMENDATION
The study found that a 35 mph speed limit is an appropriate and safe speed for Bailey
Lane from Airport Pulling Road to Montebello development. Therefore, it is
recommended to establish the speed limit on Bailey Lane to be 35 mph.
5
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