An observation on an Expressway yielded a count of 200 vehicles in a period of half an hour. Calculate the number of headways in this count: (i) greater than 4.5 seconds and (ii) less than 18 seconds
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- On an expressway, it was recorded that there is an average of 22 vehicles that are passing the said portion of the highway in every minute. Evaluate the value of the flow of traffic on that day in veh/hr.Six vehicles are observed in a 200 m section of a highway. If the average time headway is 4 sec., determine the density of flow (veh/km), flow of traffic (veh/hr) and space mean speed (kph).There are 11 vehicles observed in a 500 m section of a highway. The average time headway is 3 seconds. What is the value of the space mean speed in kph?
- Six vehicles were observed passing a point for every 25 sec. the density of traffic is 30 veh/km. Find the space mean speed.the following travel times were observed for four vehicles traversing a one km segment of highway. Observation time are 1.6min,1.2min, 1.5 min, and 1.7 min for vehicles A, B, C, and D respectively. find the rate of flow if the density is 20 veh/kmVehicles arrive at an intersection at a rate of 450 veh/h according to a Poisson distribution. What is the probability that 3 or more vehicles will arrive in two successive 30-second interval?
- Data on a traffic accident record on a certain intersection for the past 4 years has an accident rate of 9200 per million entering vehicles (MEV). If the total accident is 802, find the average daily traffic a. 75 b. 60 c. 45 d. 95Suppose you are noticing traffic in a single lane of an expressway at a particular area. The average headway is quantified as 4.2 seconds. The average spacing of successive vehicles is found as 38 meters. According to the findings, compute the average speed, flow, and density of this stream on the lane.At an impaired driver checkpoint, the time required to conduct the impairment test varies (according to an exponential distribution) depending on the compliance of the driver, but takes 60 seconds on average. If an average of 30 vehicles per hour arrive (according to a Poisson distribution) at the checkpoint, determine the average time spent in the system in minutes/vehicle. Answer in whole number.
- Data obtained from aerial photography showed nine vehicles on a 720 ft-long section of road. Traffic data collected at the same time indicated an average time headway of 4.2 sec. Determine the following. (a) the density on the highway (in veh/mi) veh/mi (b) the flow on the road (in veh/h) veh/h (c) the space mean speed (in mi/h) mi/hData on traffic accident recorded on a certain intersection for the past 5 years has an accident of 4160 per million entering vehicles. If the average daily traffic entering the intersection is 504, find the total number of accidents during 5-year period. Use L=10 miles. a. 3862 b. 38.62 c. 3826 d. 38.26Data from a 6ft by 6ft inductive loop detector collected during a 60 second interval indicates that the mean speed of traffic is 50mph among the 32 vehicles counted. Assume an average vehicle length of 19ft. Calculate a. The density, b. The occupancy, and C. The flow rate during this interval.