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.
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- 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.An expressway off-ramp consisting of a single lane leads directly to a tollbooth. The rate of arrival of vehicles at the expressway can be considered to be Poisson with a 6-24 www.Civil08.com - The Download Monster Chapter 6 Fundamental Principles of Traffic Flow 263 mean of 50 veh/h, and the rate of service to vehicles can be assumed to be exponen- tially 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 85% of the time? Assume the average length of a vehicle is 20 ft and that there is an average space of 5 ft between consecutive vehicles waiting to be served. (c) What is the average waiting time a driver waits before being served at the toll- booth (that is, the average waiting time in the queue)?determine the accident rate. If the number of accidents for 7 years recorded in a certain intersection is 5877 and if the average daily traffic is 485.
- When an incident occurs causes two lanes to be closed, a three-la e highway in one direction is carrying a total volume of 4700 veh/h. Calculate the maximum queue length, total delay, number of vehicles 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. 3 decimal places. AsapA)An intersection approach has a capacity of 1600 vph. What is the likely queue at the end of an hour if the 15 minute vehicle arrivals are 350, 500, 300, and 500? B) What is the cumulative lost time per hour if the lost time per phase is 4 seconds and the intersection operates as a 4 phase 120 second cycle? C) A queue of 200 veh. is built up waiting to get into a national park prior to open. How long it will take to clear the queue if each vehicle takes 15 seconds, yet veh. continue to arrive at 60 vph? D) The allocated effective green time across 3 phases if critical volumes are 300, 200 and 100 vehicles respectively if you have a 75 second cycle. Assume Y+AR = tl = 5 sec/ phase. E) A roadway has an estimated density of 50 vpmpl. What percent of time is a highway detector covered if the detector is 5 ft long? Assume 28 ft veh length.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
- A travel time study conducted on I-77 in the Charlotte metropolitan area shows that it takes 45 minutes to travel from exit 1 to exit 28 (northbound direction) during evening peak hours. Contrarily, it only takes 29 minutes to travel the same distance during evening off-peak hours. Calculate travel rate, delay rate, relative delay rate, and delay ratio for this 28-mile section. Calculate the total vehicle delay and total person delay if the average traffic volume is 3,600 vehicles and average vehicle occupancy is 1.2 during the peak hour. Also, calculate the vehicle miles traveled (VMT) and person miles traveled (PMT).A) The following traffic counts were taken on a rural highway during the morning peak hour at (9:00-10:00 am) on Saturday of a week. Time periods (minute) Number of vehicles Find: 9:00-9:30 AM 412 9:30-9:45 AM 702 9:45-10:00 AM 254 1. The hourly volume, the peak rate of flow within the hour, and the peak hour factor. 2. The daily volume for Saturday if the hourly expansion factor (HEF) is 14. B) At a highway segment, six vehicles travel the same distance of 20 miles during 21, 25, 30, 29, 31, and 25 minutes, respectively. These vehicles have stopped at a check points for about 5 minutes. Find the average running and overall travel speeds. C) A parking garage located in Misan city center opens its doors to serve 350 vehicles from 8 am to 3 pm. An analysis of data collected at the parking site indicates that these vehicles are parked for an average of 1.5 hours. If parking efficiency is 0.9, determine the number of additional spaces needs when the number of space-hours increases by 16%.2cb) The average speed of a 1st group of vehicles over a road msegment is per 45 km/h and their flow is 1350 vehicles hour. The average speed of a 2nd group of vehicles over the same segment is 40 km/h and their flow is 1800 hour. Determine the maximum flow of the vehicles per whole traffic stream? Wat mumiyan to booge all
- 2. The number of accidents for 6 years recorded in a certain intersection is 5834. If the average daily traffic is 494, determine the accident rate. Round off to the nearest whole number.The following figure shows the Level of Service (LOS) criteria for a multilane highway segment. If the free flow speed is 45 mph and the analysis flow rate is 1800 passenger cars per hour per lane (pc/h/In). What is the actual speed and density of the traffic flow at this specific location? What is the LOs of the location? 70 free-flow Seed 60 mih 56 mi 50 mih 45 mih LOS A 60 50 40 30 20 pomit 45 400 800 1200 1600 2000 2400 Flow Rate (pc/h/in) (uju) paads eg-buasseg abeany1) A 6-lane two-way arterial road has a maximum flow of 6,000 vehicles per hour on one direction. It is operating at 3,600 vehicles per hour at time, t=0. A collision occurs, blocking the two lanes, and restricting the flow of the outermostlane to 1,600 vehicles per hour. After 40minutes, the police have cleared the middlelane from accident debris; the operating volume at that time increased to 2,400 vehicles per hour.20 minutes past, the innermost lane was finally cleared of the accident. Traffic returns to normalas soon as the queue has already immoderate. a.Determine the maximum length of queue that occurred. b.How long did it take to dissipate the queue? c.If a vehicle entered the road at t=10 minutes, how long will it take for it to leave the traffic?