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INTRODUCTION - PURPOSE Develop Conceptual Plan to Relieve Traffic - - PowerPoint PPT Presentation
INTRODUCTION - PURPOSE Develop Conceptual Plan to Relieve Traffic - - PowerPoint PPT Presentation
INTRODUCTION - PURPOSE Develop Conceptual Plan to Relieve Traffic Congestion Improve Effectiveness of Freight Movement STUDY BOUNDARIES STUDY OVERVIEW MAJOR TASKS Data Collection Capacity Analysis Develop Conceptual Alternatives EXISTING
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STUDY BOUNDARIES
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STUDY OVERVIEW
MAJOR TASKS Data Collection Capacity Analysis Develop Conceptual Alternatives
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EXISTING CONDITIONS
NW 12TH STREET
Urban Minor Arterial Industrial/Commercial Access to HEFT and to SR 836 / Dolphin Expressway Posted Speed 40 mph
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EXISTING CONDITIONS
NW 25TH STREET
County Road Urban Collector Urban Minor Arterial Industrial/Commercial Access to SR 826 / Palmetto Expressway Posted Speed 40 mph east of NW 79th Ave. 35 mph west of NW 79th Ave.
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EXISTING CONDITIONS
NW 36TH STREET / 41st STREET
County Road ‐ Urban Other Principal Arterial Commercial / Office – North Side Industrial / Commercial / Office / Residential – South Side Interchanges at SR 821 HEFT & SR 826 / Palmetto Expressway Posted Speed 40 mph
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EXISTING CONDITIONS
NW 117TH AVENUE
County Local Road parallel to SR821 /HEFT Adjacent to Canal on an Industrial / Commercial / Office zone Connected to NW 25th St. via Un‐signalized intersection | Dead end at NW 41st St. Posted Speed 40 mph
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EXISTING CONDITIONS
Deficient Level of Service
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EXISTING CONDITIONS
EXISTING OPERATIONAL CONDITIONS (OC)
High congestion – NW 36th Street Corridor Intersections next to SR826 / Palmetto – Worst OC Intersections next to SR 821 / HEFT – Better OC NW 25th Street Corridor Acceptable level of service Excess Capacity ‐ West of NW 87th Ave.
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PROJECT NEEDS
Severe Congestion due to Freight Movement
Need to reduce traffic congestion at: NW 25th Street / SR 826 Interchange NW 36th / 41st Street Corridor Local Roads NW 114th Avenue NW 115th Avenue
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STUDY ALTERNATIVES
6 Conceptual Alternatives Alternatives included other planned improvements:
New signal for NW 115th Avenue at NW 41st Street (MDC) 41st Street Interchange Modification at HEFT (Turnpike)
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STUDY ALTERNATIVES
Analysis Criteria
Capacity Improvements NW 117th Ave. Widening HEFT Off‐Ramp Relocation Bridge Construction Right‐of‐Way Impact Toll Facility Relocation Air Quality Noise Construction Community Cohesion Visual & Aesthetics
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STUDY ALTERNATIVES
No cost No right of way impacts Increased Congestion Decreased Air Quality No Direct HEFT Connection
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STUDY ALTERNATIVES
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STUDY ALTERNATIVES
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STUDY ALTERNATIVES
Medium Cost Connecting NW 25th Street to HEFT Improved Capacity on Roadway Network Maintains Community Cohesion Delay Savings Benefit Relocation of Toll Facility Impact on HEFT Right‐of‐Way Additional Weaving on HEFT North Bound Off‐Ramp Connecting NW 25th Street to HEFT Improved Capacity on Roadway Network No Impact on HEFT North Bound Off‐Ramp Delay Savings Benefit High Cost High Construction Impacts on NW 117th Avenue High visual and aesthetics impact
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STUDY ALTERNATIVES
- Note: Annualized items for 20‐year period and 4% return rate
COST ESTIMATE AND BENEFIT‐COST ANALYSIS
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PREFERRED ALTERNATIVE
Alternative 5A (At‐grade) has been selected
as “Preferred Alternative”
Delay Savings Lower Cost Higher Benefit‐cost Ratio
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RECOMMENDATIONS
The Alternative 5A (At‐grade) is recommended to be included in the Florida Turnpike Enterprise Design Concept Report for HEFT/NW 41st Street Interchange or in a separate PD&E study. A more detailed capacity analysis is recommended to be included in the Design Concept Report and/or PD&E process. Additional intersection capacity improvements along NW 41st Street
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ADDITIONAL RECOMMENDATIONS
Signal Timing/Phasing Improvements
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