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Unformatted text preview: n the passing lane were 97 ft/sec for 700 ft distance and 84 ft/sec for 2300 ft distance. The overall average speeds for the transporters were calculated as 77.68 ft/sec for driving lane and 86.71 ft/sec for passing lane without the consideration of acceleration and deceleration rates. The average speeds calculated by ARENA are slightly greater than the speeds calculated with the assigned speed averages. This small difference in speed is due to the acceleration and deceleration behavior of the vehicles and the waiting time associated with them. In Figure 36 the speed flow relationship observed on a freeway is given. In the ARENA simulation results, the average speed for driving lane is calculated as 75.77 ft/sec (83.14 km/h) and the average speed for passing lane is calculated as 85.08 ft/sec (93.36 km/h). It can be seen that the average speed values obtained with ARENA lies in the range specified for the flow rates used in the simulation. 106 Range of Flows (both lanes) in I-76 Study Figure 36: Observed Speed Flow Relationship on a San Diego Freeway [23] In Figure 37 through Figure 41 the comparison graphs for the driving lane are given. In Figure 37, the average transfer time was plotted with the number of vehicles per hour values for each 15 minutes to observe the effects of traffic volume on average transfer time. In Figure 38, maximum transfer times for each 15 minute time intervals were plotted with the number of vehicles per hour values for 15 minute intervals. In Figure 39, 107 minimum transfer times obtained for each 15 minute time interval were plotted with the number of vehicles per hour values for 15 minute intervals. Waiting time and number of vehicles waiting in queue parameters for the driving lane were observed as zero, as it can be seen in Figure 40 and Figure 41. Comparison of Average Transfer Times per Vehicle per 15 Minute Intervals and Number of Vehicles per Hour for Driving Lane 40.2 900 700 39.8 600 500 39.6 400 Average Transfer Time No of Veh/Hour/Driving Lane Average= 39.85 Average= 491 Standard Deviation= 0.189Standard Deviation= 201 Minimum= 39.48 Minimum= 146 Maximum= 40.13 Maximum= 763 N= 96 N= 96 39.4 39.2 39 0:15 300 200 Number of Vehicles Per Hour Average Transfer Times per Vehicle per 15 Minute Interval (sec)j 800 40 100 0 2:15 4:15 6:15 8:15 10:15 12:15 14:15 16:15 18:15 20:15 22:15 Time of the Day Transfer Time Number of Vehicles Figure 37: Comparison of Average Transfer Times per Vehicle per 15 Minute Interval and Number of Vehicles per Hour per 15 Minute Interval for Driving Lane 108 Comparison of Maximum Transfer Times per Vehicle per 15 Minute Intervals and Number of Vehicles per Hour for Driving Lane 46 900 Maximum Transfer Times per Vehicle per 15 Minute Interval (sec) 700 45 600 44.5 500 400 44 Maximum Transfer Time No of Veh/Hour/Driving Lane Average= 44.93 Average= 491 Standard Deviation= 0.56 Standard Deviation= 201 Minimum= 43.83 Minimum= 146 Maximum= 45.63 Maximum= 763 N= 96 N= 96 43.5 43 42.5 0:15 300 200 Number of Vehicles Per Hour 800 45.5 100 0 2:15 4:15 6:15 8:15 10:15 12:15 14:15 16:15 18:15 20:15 22:15 Time of the Day Transfer Time Number of Vehicles Figure 38: Comparison of Maximum Transfer Times per Vehicle per 15 Minute Interval and Number of Vehicles per Hour per 15 Minute Intervals for Driving Lane Comparison of Minimum Transfer Times per Vehicle per 15 Minute Intervals and Number of Vehicles per Hour for Driving Lane 800 35.9 700 600 35.8 500 35.7 400 35.6 35.5 35.4 No of Veh/Hour/Driving Lane Minimum Transfer Time Average= 491 Average= 35.80 Standard Deviation= 201 Standard Deviation= 0.11 Minimum= 146 Minimum= 35.59 Maximum= 763 Maximum= 36.05 N= 96 N= 96 200 100 0 0:1 5 1:1 5 2:1 5 3:1 5 4:1 5 5:1 5 6:1 5 7:1 5 8:1 5 9:1 10 5 :1 11 5 :1 12 5 :15 13 :1 14 5 :1 15 5 :1 16 5 :1 17 5 :15 18 :1 19 5 :1 20 5 :1 21 5 :1 22 5 :1 23 5 :15 35.3 300 Number of Vehicles Per Hour 900 36 Minimum Transfer Times per Vehicle per 15 Minute Interval (sec) 36.1 Time of the Day Transfer Time Number of Vehicles Figure 39: Comparison of Minimum Transfer Times per Vehicle per 15 Minute Interval and Number of Vehicles per Hour per 15 Minute Intervals for Driving Lane 109 Comparison of Average Wait Times per Vehicle per 15 Minute Intervals and Number of Vehicles per Hour for Driving Lane 900 0.9 800 0.8 700 0.7 600 0.6 500 0.5 0.4 0.3 0.2 0.1 400 No of Veh/Hour/Driving Lane Average= 491 Standard Deviation= 201 Minimum= 146 Maximum= 763 N= 96 200 100 0 0:0 0 1:0 0 2:0 0 3:0 0 4:0 0 5:0 0 6:0 0 7:0 0 8:0 0 9:0 0 10 :00 11 :00 12 :00 13 :00 14 :00 15 :00 16 :00 17 :00 18 :0 19 0 :00 20 :00 21 :0 22 0 :0 23 0 :00 0 300 Number of Vehicles Per Hour Average Wait Times per Vehicle per 15 Minute Interval (sec) 1 Time of the Day Wait Time Number of Vehicles Figure 40: Comparison of Average Wait Times per Vehicle per 15 Minute Interval and Number of Vehicles per Hour per 15 Minute Intervals for Driving Lane Comparison of Average Queue Lengths per 15 Minute Intervals and Number of Vehicles per Hour for Driving Lane 800 0.8 700 0.7 600 0.6 500 0.5 0.4 0.3 0.2 0.1 No of Veh/Hour/Driving Lane Average= 491 Standard Deviation= 201 Minimum= 146 Maximum=...
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This document was uploaded on 02/26/2014 for the course E 515 at University of Louisiana at Lafayette.

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