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MindTap Engineering for Garber/Hoel's Traffic and Highway Engineering, 5th Edition, [Instant Access], 1 term (6 months)
5th Edition
ISBN: 9781305577398
Author: Nicholas J. Garber; Lester A. Hoel
Publisher: Cengage Learning US
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Chapter 13, Problem 21P
To determine
The scores for each alternative and recommendation of a preferred alternative for development.
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The Department of Traffic is considering three improvement plans for a heavily traveled intersection within the city. The intersection improvement is expected to achieve three goals: improve travel speeds, increase safety, and reduce operating expenses for motorists. The annual dollar value of savings compared with existing conditions for each criterion as well as additional construction and maintenancecosts is shown in the table below. If the economic life of the road is considered to be 60 years and the discount rate is 3.5%, which alternative should be selected? Solve the problem using the four methods for economic analysis.
12) List and define the 4 steps of the "4-step travel demand model" used in transportation planning.
For 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…
Chapter 13 Solutions
MindTap Engineering for Garber/Hoel's Traffic and Highway Engineering, 5th Edition, [Instant Access], 1 term (6 months)
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