SUBJECT:
Title
Present Updates to and Request Approval of the Preliminary Engineering Report for SW 49th Avenue North Phase, Including Intersection Control Recommendations and Alternative Drainage Retention Area Pond Sites (Budget Impact - None)
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INITIATOR: |
DEPARTMENT: |
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Steven Cohoon, P.E., County Engineer |
Office of the County Engineer |
DESCRIPTION/BACKGROUND:
This is a request to approve the updates to the Preliminary Engineering Report (PER) for the SW 49th Avenue North Phase project (between Marion Oaks Trail and SW 95th Street), which includes intersection control recommendations and updated drainage retention area (DRA) locations. The original PER for SW 49th Avenue North Phase was approved by the Board of County Commissioners in November 2023. Since then, updated traffic analyses and design evaluations have been completed, including Intersection Control Evaluations for SW 100th Street, SW 103rd Street Road, and SW 115th Street Road. Each intersection was assessed under both signalized and roundabout control scenarios for 2027 and 2047 peak hour conditions.
Although both traffic control types met acceptable Level of Service (LOS) thresholds, roundabout control was found to offer improved safety performance, reduced vehicle delays and queue lengths, and more efficient traffic flow. Accordingly, roundabouts are recommended at all three intersections. These are anticipated to be accommodated within existing or planned rights-of-way, with grading tie-ins required.
Additionally, updating the PER proposes a revised location for two DRAs to optimize design and permitting considerations.
BUDGET/IMPACT:
None
RECOMMENDED ACTION:
Recommended action
Motion to approve the updated Preliminary Engineering Report for the SW 49th Avenue North Phase project, including the selection of roundabout control at SW 100th Street, SW 103rd Street Road, and SW 115th Street Road, and approval of the proposed alternative DRA pond sites.
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