For the 4-phase intersection, the following are given: The peak hour factor=0.92, the approach speed is...
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For the 4-phase intersection, the following are given: The peak hour factor=0.92, the approach speed is 50km/hr, the average vehicle length is 6m, the intersection is leveled, and no all red time is applied on the intersection. Approach West Approach East Approach South Approach North Approach Width of approach 23 m (6 lanes in both directions cach of width of 3.6 and a median of 1.4 m) 23 m 13.6 m (4 lanes for both directions each of width of 3.0 m and a median of 1.6 m) 13.6 m (4 lanes for both directions each of width of 3.0 m and a median of 1.6 m) Phase B C D 1 N Lane group 2 Saturation flow (veh/h) 1 2 1 2 850 2400 2500 2600 2200 850 1500 1200 1500 1200 peak hour volume (veh/hr) 121 483 397 584 308 101 260 210 242 200 Lost time (sec) Required sketch the intersection, (use a ruler and make your sketch representative OR you can always use the AUTOCAD to draw). On the sketch you must locate all lane groups, the DHV for each lane group, and the dimensions. Calculate the yellow time (to the nearest 0.5 sec) for the East - West Approaches and for the North-South Approaches. Use reaction time of I sec. and the value of a is 3.4 m/sec. (1 km/hr-0.278 m/sec.). > Calculate the actual green time for all phases following the Webster method For the 4-phase intersection, the following are given: The peak hour factor=0.92, the approach speed is 50km/hr, the average vehicle length is 6m, the intersection is leveled, and no all red time is applied on the intersection. Approach West Approach East Approach South Approach North Approach Width of approach 23 m (6 lanes in both directions cach of width of 3.6 and a median of 1.4 m) 23 m 13.6 m (4 lanes for both directions each of width of 3.0 m and a median of 1.6 m) 13.6 m (4 lanes for both directions each of width of 3.0 m and a median of 1.6 m) Phase B C D 1 N Lane group 2 Saturation flow (veh/h) 1 2 1 2 850 2400 2500 2600 2200 850 1500 1200 1500 1200 peak hour volume (veh/hr) 121 483 397 584 308 101 260 210 242 200 Lost time (sec) Required sketch the intersection, (use a ruler and make your sketch representative OR you can always use the AUTOCAD to draw). On the sketch you must locate all lane groups, the DHV for each lane group, and the dimensions. Calculate the yellow time (to the nearest 0.5 sec) for the East - West Approaches and for the North-South Approaches. Use reaction time of I sec. and the value of a is 3.4 m/sec. (1 km/hr-0.278 m/sec.). > Calculate the actual green time for all phases following the Webster method
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