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Semester Presentation
- 1. TRAFFIC ANALYSIS OF INTERSECTION Kimberly Colavito Amanda Czerweic Alison Koerkenmeier Emily O’Keefe CE 452 Prof. Fang
- 2. Intersection Background Intersection: Garden Street, Asylum Avenue, and Farmington Avenue: The area within the red circle in the below figure is the intersection the team will be analyzing.
- 3. Characteristics Four legs • Asylum Avenue • Stop sign • Bus stop • Pedestrian crossing • Traffic light • Garden Street • One way • Farmington Avenue • Spring Street • One way • Pedestrian crossing • Traffic light
- 4. Field Observations and Data At time of collection • Faded crosswalks/line markings • Long queues • Poor phasing
- 5. Field Observations and Data
- 6. Significance Objective: To create a safe, more organized intersection that has clearly defined lanes, signals, and pedestrian crosswalks. Importance: • Downtown Hartford • Local businesses/apartments • Public transportation • Points of interest
- 7. Data Criteria & Plan Plan • Three days • Mondays and Wednesdays • 4:45-6:15 Collection • Cars entering intersection • Car movement • Signal phasing • Queues • Heavy vehicles • Pedestrian crossings
- 8. Cycle Lengths of Each Direction Location Green Yellow Red EB Farmington Ave/ Asylum 42.02 2.84 60.11 WB Asylum 41.75 2.92 60.24 SB Spring St 48.35 3.46 64.09 Data Collection
- 9. Average Traffic Counts With Movements Location Thru Right Turns Left Turns Heavy vehicle Queue Pedestrians Parked Cars EB Farmington Ave/Asylum 607 9 0 42 261 3 0 WB Asylum 447 66 0 33 400 0 5 SB Spring St 0 528 59 4 338 18 0 DATA COLLECTION
- 10. Stop Sign Additional Data Collected Description of Location # of Vehicles Numbers of cars that came from stop sign at EB Asylum Ave 269 Parked Cars WB Asylum 3 to 5 Buses, EB Asylum 5 U-turns onto Farmington Ave form EB Asylum Stop Sign 9 Right from Spring Left onto Farmington Ave 211 DATA COLLECTION
- 11. Data Analysis-HCS Phasing East/West bound Signal Phasing North/South bound Signal PhasingSignal Layout EB Phasing: G 42 Y 2.8 R 60 WB Phasing: G 42 Y 2.9 R 60 SB Phasing: G 48 Y 3.5 R 64
- 12. HCS Analysis Movement Group Results EB Farmington Ave/Asylum Ave WB Asylum NB Spring ST SB Spring St Approach Movement L T R L T R L T R L T R Assigned Movement 5 2 12 1 6 16 7 4 14 3 8 18 Control Delay (d), s/veh 0 108.9 88.2 77.6 0 0 0 70.5 0 1120.9 Level of Service (LOS) F F E E F Approach Delay, s/veh/LOS 108.9 F 86.8 F 0 1015 F Intersection Delay, s/veh/LOS 414 F Data Analysis-HCS
- 15. • Design vehicle • City Transit Bus Redesign: Roundabout
- 16. Redesign: Roundabout • Entering cars vs. conflicting cars • Entering from each leg • Conflicting cars already in roundabout • Number of lanes Amount of Entering Cars Amount of Conflicting Cars Asylum Ave. 513 666 Spring St. 587 447 Asylum Ave. 292 864 Farmington Ave. 324 379
- 17. Redesign: Roundabout • Radius of curvature • Center island: 31.8 feet • Outermost: 61.8 feet • Outermost(including shoulders): 65.8 feet • Design Speed • 15 miles per hour • Pedestrian considerations • Crosswalks/Sidewalks
- 20. Literature Review Roundabouts: An Informative Guide Published in June 2000 by the Federal Highway Administration (FHWA) Six Planning Steps for Roundabouts Increased Safety compared to conventional intersections Roundabouts: An Informative Guide 5.2.1 - Single-lane Roundabout
- 21. Safety • Pedestrians • New crosswalks and sidewalks • Vehicles and buses • Slower speeds • Shorter stopping sight distance • Designed bus stop Flow • More uniform and efficient • Allows for better access to surrounding area Land and Street Requirement • Additional land needed from Bushnell Park Conclusion
- 22. Questions?