Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Chapter 13, Problem 24P
To determine
If the new carpool lane is successful or if the lane should be open to all traffic.
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Traffic and Highway Engineering
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- A traffic engineer has set up a one-mile study segment of a corridor. He measures the speed of 10 vehicles. Calculate the space mean speed and time mean speed of these vehicles. If the space mean speed occurs at an optimal flow with a density of 75 veh/mi, what is the capacity of this roadway?arrow_forwardA one-way road is found to have a capacity of 2000 veh/hr. If a traffic enforcer says thatt thetraffic volume there is only 150 veh/hr, can you conclude that the traffic condition is not congested? Why or why not? Illustrate using a diagram.arrow_forwardFor this exercise, you are to design a roadway that is to carry 100,000 people a day (excluding truck occupants) – 50,000 in design direction. The vehicles that carry these people include; (1) personal vehicles (average occupancy of 1.2 people per car) 2-2 kip single axles, and (2) buses with 2-22 kip single axles (assume they are filled with an average of 40 passengers). There are also trucks on the roadway and all trucks have 1-40 kip triple axle, 1-32 kip tandem axle, and 1-8 kip single axle. You know that the soil CBR is 6, the initial PSI is 4.5 and the TSI is 2.5. Other values to be used: All drainage coefficients = 1.0 Reliability = 90% Overall standard deviation of traffic = 0.50 Concrete Modulus of Elasticity = 5.5 million lb/in2 Concrete Modulus of Rupture = 750 lb/in2 PCC load transfer coefficient = 3.0 Design a rigid and flexible pavement, to last 15 years, for a four-lane road (four lanes in design direction) with 400 trucks per day in the design direction, and…arrow_forward
- Two routes connect an origin and a destination and the flow is 15000 veh/h. Route 1 has a performance function t1=4+3*x1, and route 2 has a function of t2=b+6*x2, with the x's expressed in thousands of vehicles per hour and the t's in minutes. (a) If the user equilibrium flow on route 1 is 9780 veh/h, determine the free-flow speed on route 2(i.e. b) and equilibrium travel times. (b) If population declines reduce the number of travelers at the origin and the total origin-destination flow is reduced to 7000 veh/h, determine user equilibrium travel times and flows.arrow_forwardA one-way road is found to have a capacity of 2000 veh/hr. If a traffic enforcer says that the traffic volume there is only 150 veh/hr, can you conclude that the traffic condition is not congested? Why or why not? Illustrate using a diagram.arrow_forward(show your solutions) Given the figure above, compute for the Annual Average Daily Traffic of all vehicle types: * A.338 B.None of the above C.393 D.418 E.431arrow_forward
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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.arrow_forwardThe number of accidents for 6 years recorded in a certain section of a highway is 589. If the average daily traffic is 476, determine the accident rate per million entering vehicles.arrow_forwardIf the mean free speed and jam density for a highway were 60 mph and 160 vehicles per mile respectively, what would be the expected volume if the space mean speed of the traffic was 45 mph? At what other speed might this volume occurs?arrow_forward
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