A six lane divided highway is to be designed to replace an existing highway. The present AADT (both directions) of 6000 vehicles is expected to grow at 5% per year. Assume SN = 4 and pt = 2.5. The percent of traffic on the design lane is 45%. Determine the design ESAL if the design life is 20 years and the vehicle mix is: %3D Passenger cars (4.44kN/axle) = 60% 2-axle single unit trucks (22.2kN/axle) = 30% 3-axle single unit trucks (31.11KN/axle) = 10% %3D

A six lane divided highway is to be designed to replace an existing highway. The present AADT (both directions) of 6000 vehicles is expected to grow at 5% per year. Assume SN = 4 and pt = 2.5. The percent of traffic on the design lane is 45%. Determine the design ESAL if the design life is 20 years and the vehicle mix is: %3D Passenger cars (4.44kN/axle) = 60% 2-axle single unit trucks (22.2kN/axle) = 30% 3-axle single unit trucks (31.11KN/axle) = 10% %3D

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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The predicted traffic mix of a proposed four lane urban non-interstate freeway: Passenger cars (4.44KN/axle) = 69% 2-axle single unit trucks (22.2kN/axle) = 20% 2-axle single unit trucks (40KN/axle) = 5% 3-axle or more single unit trucks (100KN/axle) = 4% 3-axle or tractor semitrailers and combinations (90kN/axle) = 2% %3D %3D %3D The projected AADT during the first year of operation is 3500 (both directions). If traffic growth rate is estimated at 4%, percent of traffic on the design lane is 42%, pt =2.5 and SN =3, determine the design ESAL at the design life of 20 years.
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