Agenda 01/25/2022 Item #16A 7 (Traffic Signal Feasibility Report - Bellaire Bay Drive & Immokalee Road Intersection)01/25/2022
EXECUTIVE SUMMARY
Recommendation to accept a report regarding the feasibility of a traffic signal at the intersection of
Bellaire Bay Drive and Immokalee Road as requested in Item 15 at the Board of County
Commissioners Meeting on June 8, 2021.
OBJECTIVE: To report on the feasibility of a traffic signal at the intersection of Bellaire Bay Drive and
Immokalee Road.
CONSIDERATIONS: On March 10, 2020, the Board approved the award of Bid No. 20-7682 to Wright
Construction Group, Inc., for the “Immokalee Road (CR 846) at Woodcrest Drive Intersection
Improvements projects. These projects included the addition of a traffic signal at the intersection of
Immokalee Road and Woodcrest Drive and the directionalization of the Immokalee Road and Bellaire
Bay Drive intersection which removed the ability to make a left turn onto Immokalee Road at that
location. At this meeting staff identified that a future overpass would be placed on Immokalee Road
traveling over Collier Boulevard. This overpass would have a portion of the transition ramp for east and
westbound vehicles cross at Bellaire Bay Drive. Additionally, it was identified that a traffic signal at
Immokalee Road and Bellaire Bay Drive would negatively impact mobility along this critical corridor and
should not be approved by the County. At that time, the only signal that staff would support was at
Woodcrest Drive as identified above.
At the June 8, 2021, Board meeting, staff was requested to visit the feasibility of a traffic signal at
Bellaire Bay Drive and Immokalee Road. Traffic counts were conducted on June 18, 2021, and a traffic
signal warrant study was performed. The study again determined that a traffic signal is not warranted at
the intersection of Bellaire Bay Drive and Immokalee Road.
Immokalee Road is one of the county’s busiest major arterial roadways and will only become busier
with all the planned additional growth. Any time a new traffic signal is added to a roadway, the
through traffic capacity is reduced equivalent to the amount of gree n time dedicated to the side street
which in this case is estimated to be approximately a twenty to twenty -five percent reduction. The
existing traffic pattern will change without the new addition of a signal at Bellaire Bay Drive as a new
roundabout on Collier Boulevard will allow motorists exiting from the plaza to easily turn south to
head towards Immokalee Road.
Subsequent to the initial study, a new gate was installed on Limestone Trail, a private roadway connection
to the Quarry development. Traffic counts were conducted again after the gate was closed on October 18,
2021 and a new study was prepared that found traffic signal warrants are satisfied at this location.
However, such traffic signal would be of private benefit only and not benefit motorists on Immokalee
Road. The signal would also conflict with the planned overpass. If the adjacent associations choose to
fund the installation of a traffic signal at this location, it meets the warrants of such and staff can support
the installation with the following stipulations:
1) The Associations, at their sole cost and expense will commission a feasibility study to determine
whether a traffic signal can be constructed at the Bellaire Bay Drive and Immokalee Road
intersection. The study will include lane geometry, storage lengths and any additional right-of-
way necessary to accommodate the traffic signal. The County shall review and provide
comments, which shall be addressed by the Associations, prior to proceeding forward with the
traffic signal improvements.
2) The Associations, at their sole cost and expense, shall be required to design, permit and construct
the intersection improvements at Bellaire Bay Drive and Immokalee Road, which shall include
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the necessary turn lanes and traffic signal. The County shall approve all design and construction
plans.
3) If and when the County determines that the Traffic Signal must be removed, then the County shall
bear all expense for such removal. The Associations, their successors and assigns must waive
any and all claims for compensation and damages, including but not limited to future business
damages and loss of access, from Collier County as a result of the removal of the Traffic Signal.
FISCAL IMPACT: There is no fiscal impact associated with this item.
GROWTH MANAGEMENT IMPACT: This action will result in no growth management impact.
LEGAL CONSIDERATIONS: This item has been reviewed by the County Attorney, raises no legal
issues at this time and requires majority vote for Board action. -JAK
RECOMMENDATION: To accept the traffic signal feasibility report at the intersection of Bellaire Bay
Drive and Immokalee Road and direct the County Manager or designee to work with the adjacent
Associations to formalize a Developer Agreement to be brought back to the Board for approval
at a future Board meeting.
Prepared by: Daniel G. Hall, P.E., Transportation Engineering Division, Growth Management
Department.
ATTACHMENT(S)
1. Engineering Study - Signal Warrant Immokalee Rd at Bellaire Bay (DOCX)
2. Bellaire Bay Dr at Immokalee Rd 03 Dec 2021 (DOCX)
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COLLIER COUNTY
Board of County Commissioners
Item Number: 16.A.7
Doc ID: 21123
Item Summary: Recommendation to accept a report regarding the feasibility of a traffic signal at
the intersection of Bellaire Bay Drive and Immokalee Road as requested in Item 15 at the Board of
County Commissioners Meeting on June 8, 2021.
Meeting Date: 01/25/2022
Prepared by:
Title: Chief Engineer - Traffic Operations – Growth Management Department
Name: Anthony Khawaja
01/18/2022 4:11 PM
Submitted by:
Title: Manager - Planning – Growth Management Department
Name: Trinity Scott
01/18/2022 4:11 PM
Approved By:
Review:
Transportation Engineering Jay Ahmad Additional Reviewer Completed 01/18/2022 5:49 PM
Growth Management Department Trinity Scott Growth Management Department Completed 01/18/2022 5:52 PM
Growth Management Department Trinity Scott Transportation Completed 01/18/2022 5:53 PM
Office of Management and Budget Debra Windsor Level 3 OMB Gatekeeper Review Completed 01/19/2022 8:20 AM
Office of Management and Budget Laura Zautcke Additional Reviewer Completed 01/19/2022 8:26 AM
County Attorney's Office Jeffrey A. Klatzkow Level 3 County Attorney's Office Review Completed 01/19/2022 1:09 PM
County Manager's Office Amy Patterson Level 4 County Manager Review Completed 01/19/2022 2:30 PM
Board of County Commissioners Geoffrey Willig Meeting Pending 01/25/2022 9:00 AM
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Traffic Signal Warrant Analysis Engineering Study
Synopsis
Date Project Name:
November 23, 2021 Bellaire Bay Dr at Immokalee
The Traffic Operations Section of the Collier County’s Growth Management Division conducted an
engineering and traffic investigation study based upon the Manual Uniform Traffic Control Devices
(MUTCD) to determine if this intersection met the warrants, need and justification for the change in
operational roadway performance metrics.
The MUTCD, published by the U.S. Department of Transportation is the national standard for traffic
control devices. The Florida Department of Transportation has adopted the MUTCD as the State standard,
and it governs the placement and design of traffic signals, signs, and pavement markings on public and
private roads within the state.
Per Section 4C.01 Studies and Factors for Justifying Traffic Control Signal, note 03 “The satisfaction of
a traffic signal warrant or warrants shall not in itself require the installation of a traffic control signal.”
The satisfaction of any the “warrants” necessitates an engineering study that evaluates if the installation
of a traffic control signal will improve the overall safety and/or operation of the intersection.
CONCLUSION:
This study conforms with the criteria promulgated by the Florida Department of Transportation (FDOT) and Florida
Statute, Section 316 and found that the location met warrants for a traffic signal installation. However, a traffic
signal at this location would be of private benefit only and not in the interest of the public. A signal would also
conflict with the planned overpass. Therefore, staff is not interested in installing a signal at this location. However,
if the developer chooses to fund the installation of a traffic signal at this location, it meets the warrants of such and
staff can support the installation with the stipulation that the design, installation, and any related intersection
modification of the signal location be the responsibility of the developer. Additionally, upon request of the County,
the developer shall also pay for removal of the signal when the future overpass project is constructed at Immokalee
Road and Collier Boulevard.
Immokalee Road is one of the county’s busiest major arterial roadways and will only become busier with all the
planned additional growth. Any time a new traffic signal is added to a roadway, the capacity of the roadway is
reduced. The existing traffic pattern will change without the new addition of a signal at Bellaire Bay Drive as a
new roundabout on Collier Boulevard will allow motorists exiting from the plaza to easily turn south to head
towards Immokalee Road.
RECOMMENDATIONS:
Approve the conditional installation of a traffic signal at this location as described.
End of Synopsis
Issue for Resolution: Traffic Signal Warrant Analysis
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Packet Pg. 819 Attachment: Engineering Study - Signal Warrant Immokalee Rd at Bellaire Bay (21123 : Bellaire Bay Dr at Immokalee Rd)
Bellaire Bay Dr at Immokalee
Traffic Signal Warrant Analysis
23 November 2021
Prepared by:
Daniel Hall, P.E.,
Principal Project Manager
Authorized by:
Collier County Growth Management Department
Traffic Operations Section
P.E. Registration No: 58050
Signature: _________________
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Immokalee Rd and Bellaire Bay Dr.
1. BACKGROUND
Due to a public request, the Traffic Operations Section of the Collier County Growth Management Department has
conducted a Signal Warrant Analysis at the intersection of Immokalee Rd at Bellaire Bay Dr. in Collier County, Florida.
Immokalee Rd extends from east to west near this intersection. Bellaire Bay Dr intersects from the north from this
intersection. The guidelines and procedures outlined in the Manual on Uniform Traffic Control Devices (MUTCD, 2009)
determined the methodology of this analysis.
Figure 1
Study Intersection
The MUTCD, published by the U.S. Department of Transportation is the national standard for traffic control devices. The
Florida Department of Transportation has adopted the MUTCD as the State standard, and it governs the placement and
design of traffic signals, signs, and pavement markings on public and private roads within the state.
Per Section 4C.01 Studies and Factors for Justifying Traffic Control Signal, note 03 “The satisfaction of a traffic signal
warrant or warrants shall not in itself require the installation of a traffic control signal.” The satisfaction of any the
“warrants” necessitates an engineering study that evaluates if the installation of a traffic control signal will improve the
overall safety and/or operation of the intersection.
Bellaire Bay Dr Immokalee Rd
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2. EXISTING CONDITIONS
The intersection of Immokalee Rd and Bellaire Bay Dr. is located approximately a (1/2) mile east of the nearest signalized
intersection at Collier Blvd and Immokalee Road in Collier County, Florida.
For the Signal Warrant Analysis, Immokalee Rd is considered the major street, for all peak hours, and there are three lanes,
one in each direction Eastbound and Westbound through the intersection.
The minor street considered is Bellaire Bay Dr. for all peak hours and has one northbound lane with dedicated left and right
turning movements at the approach to Immokalee Rd.
The northern developments traffic distribution is subject to multiple travel ways to both Immokalee Rd and Collier Blvd,
which would account for the less than expected volume count for this intersection.
Table 2-1 below summarizes the existing conditions at this intersection.
Table 2-1: Summary of Existing Conditions
Features Description
Major Street Immokalee Rd
Minor Street Bellaire Bay Dr.
Area Location The intersection approximately (1/2) mile east of the nearest signalized intersection at
Collier Blvd. and Immokalee Rd.
Surrounding Development There are residential and light commercial developments near the intersection.
Land Uses at the
Intersection
Not all the adjoining land parcels are developed.
Pedestrian Generators There are designated bicycle lanes on Immokalee Rd.
Traffic Control Bellaire Bay Dr approach is stop-controlled.
Posted Speed Limit Immokalee Rd – 45 MPH
Bellaire Bay Dr. – 30 MPH
Lighting Condition There is street lighting along Immokalee Rd
Sidewalks There are sidewalks along the south side of Immokalee Rd
Pavement Condition The pavement condition seems fair for both routes.
Adjacent Signalized
Intersections
Collier Blvd and Immokalee Rd
Other Distinct Features FPL overhead Transmission lines are on the north and south side of Immokalee Rd.
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2.1. Traffic Volumes:
The median was geometrically altered in late 2020 allowing only right turn traffic from Bellaire Bay. In accordance
with the MUTCD, the left turn traffic from Bellaire Bay Dr is assumed to be proceeding to the nearest U turn
location to make the turn movement to head east as noted in Figure 2.
On June 16, 2021, a technician set up 24-hour approach machine counters to obtain westbound U Turn Movement
volumes. This location is approximately .25 miles due west of Bellaire Bay Dr. Figure 2 diagrams the counter
location,
Figure 2
Traffic Counter Locations
Quantitative results are as follows:
Table 2-1 Input Data
Table 2-2 Warrant Summary
Chart 2-1 Warrant 1 - Condition A - Minimum Vehicular Volume
Chart 2-2 Warrant 1 - Condition B - Interruption of Continuous Traffic
Chart 2-3 Warrant 2 – Four Hour Vehicular Volume
Chart 2-4 Warrant 3 – Peak-Hour Vehicular Volume
The 24-hour approach counts indicated approximately 673 vehicles conducted a U Turn movement. The parcel on
the south side of Immokalee Rd is currently under development and may account for some of the U Turn traffic.
To be conservative the calculations did not discount any volume accessing this southern parcel and assumed that
all traffic was conducting the U Turn movement.
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Table 2-1 Input Data
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Table 2-2 Warrant Summary
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Chart 2-1 Warrant 1 - Condition A - Minimum Vehicular Volume
Warant 1 - Eight (8) Hour Vehicular Volume
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Chart 2-2 Warrant 1 - Condition B - Interruption of Continuous Traffic
Warant 1 - Eight (8) Hour Vehicular Volume
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Chart 2-3 Warrant 2 – Four Hour Vehicular Volume
NOTE:
The volume of the Major Steet is more than
the 1000 vph for the 6 hours met thus are
not shown on the graph
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Chart 2-4 Warrant 3 – Peak-Hour Vehicular Volume
NOTE:
The volume of the Major Steet is more than
the 1300 vph for the 1 hour met thus is not
shown on the graph
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Crash Data:
A summary of the reported crashes from 2016 through 2021 (May) that were susceptible to correction and involved
injuries are surmised below.
Crash Summary: Immokalee Rd at Bellaire Bay Dr.
There were a total of fifteen (15) reported crashes in a five (5) plus year timespan that were noted as “angle” related
crashes. From this total, three (3) were rear end crashes and eight (8) were noted as aggressive driving. One (1) was
noted as a crash with injuries of which two (2) people were noted as being injure. Zero (0) reported crashes were
noted as serious and there were no fatalities.
Warrant 7 Crash Experience requires that all of the following criteria are met:
• Adequate trial of alternatives with satisfactory observance and enforcement has failed to reduce the cras h
frequency; and
• Five (5) or more reported crashes in a 12-month period that could be susceptible to correction by the
installation of a traffic control signal with each crash involving personal injury or property damage; and
• For each of any 8 hours of an average day, the vehicles per hour (vph) given in both of the 80 percent
columns of Condition A in Table 4C-1 (see Section 4C.02), or the vph in both of the 80 percent columns
of Condition B in Table 4C-1 exists on the major-street and the higher-volume minor-street approach,
respectively, to the intersection, or the volume of pedestrian traffic is not less than 80 percent of the
requirements specified in the Pedestrian Volume warrant. These major-street and minor-street volumes
shall be for the same 8 hours. On the minor street, the higher volume shall not be required to be on the same
approach during each of the 8 hours.
Crash summaries are detailed in the APPENDIX B.
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CONCLUSION & RECOMMENDATION
This intersection did satisfy multiple warrants per the Manual on Uniform Traffic Control Devices (MUTCD
2009). For this reason, the recommendation is to proceed with an engineering study of this intersection to
determine if a traffic signal is needed and funding is available.
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APPENDIX A
Traffic Volume Counts
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APPENDIX A
Traffic Volume Counts
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APPENDIX A
Traffic Volume Counts
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APPENDIX B
CRASH DATA
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APPENDIX B
CRASH DATA
End of Report
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