An intersection has a three-phase signal with the movements allowed in each phase and corresponding analysis and saturation flow rates shown in the table below. Assume the lost time is 4 seconds per phase and a critical intersection v/c of 0.90 is desired. Phase 1 3 Allowed movements NB L, SB L NB T/R, SB T/R EB L, WB L EB T/R, WB T/R Analysis flow rate 330, 365 veh/h 1125, 1075 veh/h 110, 80 veh/h 250, 285 veh/h Saturation flow rate 1700, 1750 veh/h 3400, 3300 veh/h 650, 600 veh/h 1750, 1800 veh/h Calculate the sum of the flow ratios for the critical lane groups. O 0.709 O 0.857 O 0.787 O 0.829

On a two-lane intersection approach, following traffic queue data were observed. Clock Time | Cycle # Number of Vehicles in Queue +0 sec +20 sec +40 sec 5:00 1 4 5:01 2 7 6. 7 5:02 3 6. 5:03 4 5 8 4 5:04 7. 6. 5:05 4 7 5:06 7. 8 8. 5:07 8 4 5:08 9 5:09 10 4 3 Total 64 63 Sum(Vig) = | 192 Vstop = 130 VT = 165 %3D FFS = 35 %3D 1) Estimate average time in queue = 20,4 sec/veh veh 2) The number of vehicle stopping per lane per cycle = 3) Fraction of vehicles stopping = %3D 4) Control delay = sec/veh 955 97

An intersection has a three-phase signal with the movements allowed in each phase and corresponding analysis and saturation flow rates shown in the table below. Assume the lost time is 4 seconds per phase and a critical intersection v/c of 0.90 is desired. O 20.464 sec O 22.411 sec O 24.460 sec Phase O 21.035 sec Allowed movements Analysis flow rate Saturation flow rate Using v/c equalization ratio, calculate the effective green time for phase 2 NB L, SB L 330, 365 veh/h 1700, 1750 veh/h 2 NB T/R, SB T/R 1125, 1075 veh/h 3400, 3300 veh/h EB L, WBL 110, 80 veh/h 650, 600 veh/h 3 EB T/R, WB T/R 250, 285 veh/h 1750, 1800 veh/h

The average normal flow on cross roads A and B during design period are 400 and 250 pcu per hour. The saturations flow values on these roads are estimated as 1200 and 1000 pcu per hour respectively. The all-red time required for pedestrian crossing is 12secs. Calculate cycle time for two phase signal system.