Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Chapter 6, Problem 16P
To determine
(a)
The speeds of the shock waves created by the operation of the school zone.
To determine
(b)
The number of vehicles affected by the school zone during this 30-minute operation.
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A flow characteristic that is related to the density and obtained from speed data is occupancy. Data obtained from a 6-ft by 6-ft inductive loop detector is used to determine the traffic density. With an occupancy of 9.375%, determine the density, in vehicles per mile, for a mean vehicle length of 27 feet.
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)
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(b)
the flow on the road (in veh/h)
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(c)
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The Data below shows the result of the flow of traffic at a certain part of a highway by observing the arrival times for four vehicles at two sections A and B that are 150 m apart. the total observation time at section A is 15 sec. determine the flow at section A.
Chapter 6 Solutions
Traffic and Highway Engineering
Ch. 6 - Prob. 1PCh. 6 - Prob. 2PCh. 6 - Prob. 3PCh. 6 - Prob. 4PCh. 6 - Prob. 5PCh. 6 - Prob. 6PCh. 6 - Prob. 7PCh. 6 - Prob. 8PCh. 6 - Prob. 9PCh. 6 - Prob. 10P
Ch. 6 - Prob. 11PCh. 6 - Prob. 12PCh. 6 - Prob. 13PCh. 6 - Prob. 14PCh. 6 - Prob. 15PCh. 6 - Prob. 16PCh. 6 - Prob. 17PCh. 6 - Prob. 18PCh. 6 - Prob. 19PCh. 6 - Prob. 20PCh. 6 - Prob. 21PCh. 6 - Prob. 22PCh. 6 - Prob. 23PCh. 6 - Prob. 24PCh. 6 - Prob. 25PCh. 6 - The arrival times of vehicles at the ticket gate...Ch. 6 - Prob. 27P
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- 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/kmarrow_forwardData 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.arrow_forwardAssume you are an observer standing at a point along a three‐lane roadway. All vehicles in lane 1 are traveling at 30 mi/hr, all vehicles in lane 2 are traveling at 45 mi/hr, and all vehicles in lane 3 are traveling at 60 mi/hr. The spacing between vehicles in each lane is 0.5 mile. If you collect spot speed data for all vehicles as they cross your observation point for 2 hours, what will be the time‐mean speed and space‐mean speed for this traffic stream?arrow_forward
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- 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).arrow_forwardAssume you are an observer standing at a point along a three-lane roadway. All vehicles in lane 1 are traveling at 48 kph, all vehicles in lane 2 are traveling at 72 kph, and all vehicles in lane 3 are traveling at 97 kph. There is also a constant spacing of 75 m between vehicles. If you collect spot speed data for all vehicles as they cross your observation point, for 30 minutes, what will be the time-mean speed and space-mean speed for this traffic stream?arrow_forwardSix vehicles were observed passing a point for every 25 sec. the density of traffic is 30 veh/km. Find the space mean speed.arrow_forward
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