Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Chapter 19, Problem 6P
To determine
Thedeign equivalent single axel load
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A six-lane divided highway is to be designed to replace an existing highway. The present AADT (both directions) of 5,300 vehicles is expected to grow at 5 percent per annum. Assume
SN = 4
and
pt = 2.5.
The percent of traffic on the design lane is 45 percent. Determine the design ESAL if the design life is 20 years and the vehicle mix is as follows. (Assume the contribution of passenger car traffic to the total ESAL is negligible. Use single-axle load equivalency factors for 2-axle and 3-axle trucks.)
Passenger cars (1,000 lb/axle)=59%2-axle single-unit trucks (5,000 lb/axle)=25%3-axle single-unit trucks (7,000 lb/axle)=16%
A six-lane divided highway is to be designed to replace an existing highway. The present AADT (both directions) of 5,700 vehicles is expected to grow at 5 percent per annum.
Assume SN = 4 and pt = 2.5.
The percent of traffic on the design lane is 45 percent. Determine the design ESAL if the design life is 20 years and the vehicle mix is as follows. (Assume the contribution of passenger car traffic to the total ESAL is negligible. Use single-axle load equivalency factors for 2-axle and 3-axle trucks.)
Passenger cars (1,000 lb/axle) = 64%
2-axle single-unit trucks (5,000 lb/axle) = 27%
3-axle single-unit trucks (7,000 lb/axle) = 9%
Total ESAL =
Choose the right answer
a rural highway on a level terrain has the following traffic composition: 40 % Passenger cars 30 % trucks 20 % buses 10 % recreational vehicles Find the total volume expressed as pcu/hr. if the total volume is 6000 veh/hr. *
a-7620
b-7630
c-7640
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