2017 Urban Transportation Planning Reports Subject. (19/07/2017) Deadline? : Aug.10th Where to submit? : Write down your reports in papers and put them into the Report Box in front of the door of office No.1037 Subject 1; Explain about why traffic congestion occur even with the construction of New expressways, within 300 words. Subject 2; Answer the nest questions. Assuming a linear speed-density relationship, the mean free speed is observed to be 60 mph near zero density, and the corresponding jam density is 140 veh/mi. Assume that the average length of vehicles is 20ft. (1) Write down the speed-density and flow-density equations. (2) Draw the v-k, v-q, and q-k diagrams indicating critical values (such as max value of q etc.) (3) Compute speed and density corresponding to a flow of 1000 veh/hr. (4) Compute the average headways, spacings, clearamces, and gaps when the flow is maximum. Subject 3; Answer the nest questions. A small town has a bus configuration as shown in Figure 1. (E) is the downtown bus stop. The data pertain to a 2-hour peak. Develop an operational plan so that good coordination is established for passengers on the (A)(B) route to the (C)(D) route. Summarize your results and provide the following information: (1) cycle time, (2) headways, (3) terminal time, (4) fleet size, and (5) commercial speed. Route (A)(B) Route (C)(D) Length 10 mi 8 mi Operating time 60 min 50 min Maximum Load 500 passengers 350 passengers Vehicle capacity 45 seats 45 seats Policy headway 45 min 45 min 0.8 0.8 10 min 10 min Load factor Minimum terminal time (C) 4mi (A) 6mi 4mi (E) 4mi (D) Figure 1 (B)