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- Based on the following traffic speed frequency table, the median and 85th percentile speeds are approximately ………. & ……….. respectively. a. 56 & 66 b. 75 & 94 c. 79 & 110 d. none e. 67 & 92Express (a) 275C in K, (b) 25.55 K in C, (c) –47.0C in F, and (d) 100.0F in KWhat is the intersection sight distance (m) needed at a stop controlled intersection for a passenger car to turn left onto a 2-way, 2-lane road with a design speed of 90 km/h? [round to the nearest meter] Response Feedback: ISD=0.278V t major g
- (show your solutions) Compute for the Average Speed for Control Point B-C. * A.24 kph B.None of the above C.25 kph D.30 kph E.28.8 kphQuestion- Topic: Traffic Studies on Flow, Speed, Travel Time, Volume and Capacity The lost time due to starting delay on a traffic signal approach is noted to be 3 sec, the actual time is 20sec and the amber time is 3sec. How much is the effective green time? greenif the distance is (1000) ft and the travel time is (18.9) second, then the . space mean speed is 50.5 ft/sec 52.9 ft/sec 50.4 ft/sec
- Q3- For the traffic signal data below; 1- Fill the table with Data. 2 - calculate optimum cycle length. 3- Draw the timing diagram. Yellow Time All red Time (sec) lost Red Time Geff. Green Phases time (sec) Time (sec) (sec) (sec) (sec) P1 2 1 26 P2 3 1 30 P3 3 2 29 P4 3 1 31Based on the following traffic speed frequency table, the median and 85th percentile speeds are approximately & respectively. Speed class (kph) 30- <40 40- <50 50- <60 60- <70 70- <80 80- <90 90- <100 100- <110 Frequency 8 12 20 25 22 15 8 a noneQ4: a. At a certain at grade intersection, it's decided to use a 4 phases traffic signal for the four approaches shown below. South Approach Width (m) Actual flow (DHV) pe/hr North East West 7 8 12 10.5 331 427 1104 715 Left turn vehicles of 478 630 1953 1047 saturation flow Assuming the following for each phase: Starting delay and falling discharge time = 3 sec, amber time = 5 sec, all red = 1 sec, red/amber I sec. Find the optimum cycle time and the controller green for each phase.
- Observers stationed at two sections XX and YY, 1000 ft apart on a highway, record the arrival times of four vehicles as shown in the table below. Vehicle Section XX Section YY A T0 T0 + 14.33 sec B T0 + 3.76 sec T0 + 18.14 sec C T0 + 7.94 sec T0 + 22.06 sec D T0 + 12.13 sec T0 + 27.87 sec If the total time of observation at XX was 20 sec, determine (a) the time mean speed, (b) the space mean speed, (c) the flow at section XX, and (d) the density on the highwayDesign a two phase signal for the VCI = 400 PCU/hr V250 PCU/hr SE = 1250 PCU/hr data using All red for pedestrain crossing mindbook 11 -SE = 1000 PCU/hr Webster method =125ee(show your solutions) Compute for the Average Speed for Control Point A-B. * A.24 kph B.28.8 kph C.25 kph D.None of the above E.30 kph