Q2A two-way roadway has two lanes each way with an annual average daily truck traffic (AADT) of 5,250 in 2014and 5,460 in 2015. The EALF of the traffic is listed in table below.Traffic volumeEALF50% of traffic (single axle)30% of traffic (tandem axle)20% of traffic (tridem axle)0.251.52.38The pavement is to be designed for a design life of 20 years starting from 2015. Determine the design ESAL inthe design lane. Assume lane distribution factor is 0.45.

Answered: A two-way roadway has two lanes each…

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 pavement that need to be constructed is a six-lane divided highway. The present AADT (both directions) of 6000 vehicles is expected to grow at 5% per annum. 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: Passenger cars (1000 lb/axle) 60% 2-axle single-unit trucks (5000 lb/axle) = 30% 3-axle single-unit trucks (7000 lb/axle) 10% %3D Dosign the navement (with the design ESAL calculated in auestion 3a)
A section of a two-lane rural highway is to be realigned and replaced by a four-lane highway with a full-depth asphalt pavement. The AADT (both ways) on the existing section can be represented by 750 ESAL. It is expected that construction will be completed 5 years from now. If the traffic growth rate is 2 percent and the effective CBR of the subgrade on the new alignment is 9.0, determine a suitable depth of the asphalt pavement (in inches) using the AASHTO method. Take the design life of the pavement as 20 years. The resilient modulus of the asphalt (EAC) is 450,000 lb/in. ². Assume m; for the subgrade is 1 and the percent of traffic on the design lane is 45 percent. Use a reliability level of 90 percent, a standard deviation of 0.45, and a design serviceability loss of 2.0. 8.25 inches
A six lane divided highway is being designed for a current AADT of 6000 vehicles with a growth rate of 5% and a design life of 20 years. If the vehicle mix is 60% passenger cars (2 kips), 30% 3-axle single unit truck (12 kips) and 10% 3-axle tandem trailer (30 kips). The pavement has a terminal serviceability index (pt) of 2.5 and Structural Number (SN) of 5. Determine the design ESAL?

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