A 12 ft long loop detector has observed six vehicles that have crossed the device in a 148 second period, for the following durations: 0.44; 0.48; 0.5; 0.41; 0.49; and 0.55. The six vehicles are 18, 21, 20, 23, 17 and 19 ft respectively. a. How long is the total time for the detector to be occupied? b. What is the % lane occupancy? c. How many vehicles per mile density value, k? d. How many miles per hour is the rated speed, v? e. How many vehicles per hour current value, q?

A 12 ft long loop detector has observed six vehicles that have crossed the device in a 148 second period, for the following durations: 0.44; 0.48; 0.5; 0.41; 0.49; and 0.55. The six vehicles are 18, 21, 20, 23, 17 and 19 ft respectively. a. How long is the total time for the detector to be occupied? b. What is the % lane occupancy? c. How many vehicles per mile density value, k? d. How many miles per hour is the rated speed, v? e. How many vehicles per hour current value, q?

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter6: Fundamental Principles Of Traffic Flow

Section: Chapter Questions

Problem 16P

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What count period would you choose for the volume study at the intersection with signal cycle length (a) 60 seconds, (b) 90 seconds, and (c) 120 seconds?
A 12 ft long loop detector has observed six vehicles that have crossed the device in a 148 second period, for the following durations: 0.44; 0.48; 0.5; 0.41; 0.49; and 0.55. The six vehicles are 18, 21, 20, 23, 17 and 19 ft respectively. Calculate: b. What is the % lane occupancy?
A construction zone on a highway has a posted speed of 40 kmph. The speeds of vehicles passing through this construction zone are normally distrbuted with a mean of 45 kmph and a standard deviation of 4 kmph. a.) What is the probability that a vehicle passing through the construction zone exceeds the posted limit? b.) What is the probability that a vehicle passing through the construction zone is travelling at speeds between 38 and 49 kmph? c,) For the next 30,000 vehicles passing through the construction zone, how many will be passing through the zone with speed less then 50 kmph?
plz, solve this problem, it is not graded question. Transportation Engineering-1 During a 70 sec period, a detector is occupied by vehicles for the following times: 0.31, 0.39, 0.41, 0.35, and 0.53 sec. Estimate the values of flow (q), density (k) and speed (v). Assume that the loop detector is 10 ft and that that the average length of the vehicle is 20 ft.
PLEASE ANSWER ANY TWO A)A roadway with a capacity of 4000 vph has 15 minute arrivals of 1000, 500, 500, and 2000 during the peak hour. The queue at the end of the hour is most likely. B)A 3ft detector is used along a highway to help measure density. What is the density (in vpmpl) if the detector is occupied 50 percent of the time. Assume 28 ft veh length. C)If vehicles arrive at a rate of 360 vph, what is the probability of exactly 2 vehicles arriving in 20 seconds? (2 to decimals) D)How many vehicles have "arrived" if for 3 straight 15 minute periods the arrival rates are 240 vph, 400 vph, 600 vph?
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