Traffic Impact Assessment for ABC Verdun Project
The Traffic Impact Assessment for the ABC Verdun project, led by John Khoury, PhD, PE, provides detailed analysis on traffic counts, scenarios, intersection conditions, microsimulation results, and recommendations for a mega-scale mall opening in the area. The assessment includes traffic data collection, analysis of peak hours, network simulation results, and intersection level of service assessment with and without suggested improvements. The project aims to address traffic flow challenges resulting from the opening of the largest mall in the area.
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TRAFFIC IMPACT ASSESSMENT ABC VERDUN John Khoury, PhD, PE Traffic Management Center Principal Traffic Engineer
OUTLINE Project Description Traffic Counts Traffic Analysis Scenarios Intersection LOS Conditions Without Project With Project Network Microsimulation Results Queueing Analysis Traffic Recommendations 2
PROJECT DESCRIPTION 1) A mega scale mall is planned to open this summer in Verdun area, between Verdun Street, Al Rachideen Street and Tamer Mallat Street. 2) The mall is the largest mall in the area and will be the main attractor for shopping. 3) Traffic into the mall and out will peak in the afternoon hours, which is assumed for the traffic analysis. 4) Around 1000 vehicles are assumed to enter and 900 vehicles to exit during one peak hour. 3
TRAFFIC COUNTS 1) Tuesday, July 11, 2017 2) Wednesday, July 12, 2017 3) Counts were taken during good weather 4) Counts were taken for three hours, morning, midday and evening peaks over two weekdays 5) Counts were conducted at the intersections, including all movements 4
TRAFFIC ANALYSIS SCENARIOS 1) Existing Conditions ABC still closed (without ABC traffic) 2) Existing Conditions ABC open (with ABC traffic) 3) Modified timing / suggested improvements (with ABC traffic) 5
INTERSECTION LOS ASSESSMENT Intersection LOS Comparison for PM Peak Hour With ABC modified timing w/o ABC with ABC Street Int. delay/veh LOS delay/veh LOS delay/veh LOS 505 53a 53 53b 55 57 39 39a 504 31.2 7.4 7.4 8.7 30.6 47.3 18.4 16.6 46.4 C A A A C D B B D 95.7 16.1 23.3 10.6 36.9 90.3 90.2 31.1 51.3 F B C B D F F C D 40.2 11.6 8.9 8.8 46.8 48.4 37.8 26.1 55.9 D B A A D D D C D Rachideen Verdun 6
NETWORK ANALYSIS - SIMULATION System Wide Microsimulation Results Total Delay Average Delay/veh Average Speed Served Scenario (hr) 222 446 (sec) 89 154 (kph) 19 13 (veh) 8600 9550 Current/Existing With ABC Traffic Percent Change 101% 73% -32% 11% With signal re-timing 295 99 18 10250 Percent Change -34% -36% 38% 7% 7
QUEUEING ANALYSIS Service Channels 1 2 3 veh/hr veh/min veh/min 200 3.33 4.00 0.83 4.17 1.50 300 5.00 4.00 1.25 200 3.33 8.00 0.42 0.30 0.21 300 5.00 8.00 0.63 1.04 0.33 400 6.67 8.00 0.83 4.17 0.75 500 8.33 8.00 1.04 200 3.33 12.00 0.28 0.11 0.12 300 5.00 12.00 0.42 0.30 0.14 400 6.67 12.00 0.56 0.69 0.19 500 8.33 12.00 0.69 1.58 0.27 Arrival Flow Service rate System Utilization Queue Service Time (min) (veh) + 1 N 1 P = Q 0 N Arrival rates are random and variable Service rates around 4 vehicles per minute, per ticket channel Two ticketing channels per entrance to minimize queues and service time Preferred 25 meters of storage if two ticketing channels are used 1) 2 ! 1 ( 1 / ) N Q N + = w Q + 2) = t 3) Where, Q = average length of queue [veh], w = average waiting time in the queue [unit time/veh], and t = average time spent in the system [unit time/veh]. 4) 8
TRAFFIC RECOMMENDATIONS 1) Provide two ticketing channels at every entrance 2) Provide 25 meters of storage per lane entrance 3) Re-optimizing of cycle timing/phasing at all intersections in vicinity 4) Reconfigure intersection 39 to allow dual left turn 5) Regulate with enforcement street parking along Verdun street 6) Restrict access from NB Verdun free right-turn into ABC 7) Mall exit along Tamer Mallat, only right turn 8) Amine Takeyyeddine street, only right turn to Verdun street (no through movement) 9
Q & A QUESTIONS ??? 10
