The minimum cycle length for an intersection is determined to be 95 seconds. The critical lane group flow ratios were calculated as 0.235, 0.250, 0.170, and 0.125 for phases 1–4, respectively. What Xc was used in the determination of this cycle length, assuming a lost time of 5 seconds per phase?
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- The minimum cycle length for an intersection is determined to be 95 seconds. The cirtical lane group flow ratios were calculated as 0.235, 0.250, 0.170 and 0.125 for phases 1- 4 respectively. What Xc was used in the determination of this cycle length, assuming a lost time of 5 seconds per phase?TRANSPORTATION ENGINNERING-TRAFFIC SIGNALS An approach to a predetermined signal has 25 seconds of effective green for a 60 second cycle. The approach volume is 500 vehicles/hour and the saturation flow rate is 1400 vehicles/hour. Calculate the average vehicle delay using D/D/1 queing.Subject: transportation engineering Read the question carefully and give me right solution according to the question. A signal has four phases, where the critical lane group flow ratios are 0.115, 0.204, 0.099, and 0.248. If the lost time per phase is 6 seconds and the critical intersection v/c ratio is 0.88, calculate the minimum cycle length and the phase effective green times such that the lane group v/c ratios are equal.
- An expressway consists of four lanes, where the capacity per lane is 2500 vehicles. In normal days, 6500 vehicles pass. However, there is an emergency road repair conducted in which two lanes will be closed. The repair lasted 150 minutes. Calculate the maximum queue length, total length, and number of vehicles impacted by the event, and average individual delay.The rate of arrival of vehicles at the expressway can be considered to be Poisson with a mean of 45 veh/hr, and the rate of service to vehicles can be assumed to be exponentially distributed with a mean of 1 min. (a) What is the average number of vehicles waiting to be served at the booth (that is, the number of vehicles in queue, not including the vehicle being served)? (b) What is the length of the ramp required to provide storage for all exiting vehicles 90% of the time? Assume the average length of a vehicle is 18 ft and that there is an average space of 10 ft between consecutive vehicles waiting to be served. (c) What is the average waiting time a driver waits before being served at the tollbooth (that is, the average waiting time in the queue)?It is known that the capacity is 3800 veh/h and the jam density is 225 veh/mi. What is the space-mean speed of the traffic at capacity, and what is the free-flow speed? if chart or graph was used please attaxch below and explain how its used
- Observation post reveals that 8 vehicles passed through at intervals of 4.6 s, 6.23 s, 5.9 s, 7.1 s, 4.9 s, 3.8 s, 12.6 s, and 13.0 s, respectively. If the total distance travelled by the vehicles is 200 meters, i. If the density of traffic is 20 vpk, compute the rate of flow of traffic in vph. ii. If the speed limit imposed along the roadway is 100 kph, determine the percentage of speed limit violators.Cars have a long queue at a stop sign. If the total time delay queueing is one min., compute the traffic intensity if the service rate of the road is only 360 veh/ hr. Assume both arrival and departure rates are exponentially distributed.When an incident occurs that causes two lanes to be closed, a three-lane highway in one direction is carrying a total volume of 4700 veh/h. Calculate the maximum queue length, total delay, number of vehicle impacted by the event and average individual delays if the highways capacity is 2550 veh/h/ln. It takes 120 minutes to clear the obstacle.
- The average queue length at the intersection of the two roads with a stop sign is 4 vehicles. If the arrival rate of vehicles at the stop sign is 300 veh/hr, determine the service rate of the road in veh/hr. Assume both arrival and departure rates are exponentially distributed.Traffic data are collected between Point X and Y. Seven vehicles pass in Point X at intervals of 18, 17, 19, 28, 25, 22, and 24 sec respectively. The vehicle's speeds are 60, 50, 55, 58, 52, 49, and 30 kph respectively. Calculate the flow, density, time mean speed, and space mean speed. Determine also the length of the segment.The number of vehicles that can enter the on-ramp of Subic-Clark Expressway is controlled by a metering system. If the vehicles can enter the expressway at a rate of 500 veh/hr, and the rate of arrival of the vehicles at the on-ramp is 400 veh/hr during the peak hour. Determine the expected number of units waiting to be served in the system.