Thedeign equivalent single axel load ( ESAL ) .

Question

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:Passenger cars (4.44kN/axle) = 60%2-axle single unit trucks (22.2kN/axle) = 30%3-axle single unit trucks (31.11kN/axle) = 10%

Answer 1

Question

Chapter 19, Problem 6P

To determine

Thedeign equivalent single axel load (ESAL).

Expert Solution & Answer

Trending nowThis is a popular solution!

See solution

Check out sample textbook solution

Students have asked these similar questions

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:Passenger cars (4.44kN/axle) = 60%2-axle single unit trucks (22.2kN/axle) = 30%3-axle single unit trucks (31.11kN/axle) = 10%

A six-lane divided highway is to be designed to replace an existing highway. The present AADT (both directions) of 6,000 vehicles is expected to grow at 5% per annum. Assume SN = 4 and pt = 2.5. The percent of traffic on the design lane is 45%. (a) 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% (b) Based on this design ESAL, design a suitable pavement consisting of an asphalt mixture surface with an elastic modulus of 250,000 lb/in2, a granular base layer with a structural coefficient of 0.14, and a granular subbase layer with a structural coefficient of 0.09 on a subgrade having a CBR of 10. Assume all mi values = 1. Use a reliability level of 85%, a standard deviation of 0.45, and a design serviceability loss of 2.0

The predicted traffic mix of a proposed four-lane urban non-interstate freeway is as follows. Passenger cars = 78% Single-unit trucks: 2-axle, 5,000 lb/axle = 12% 2-axle, 9,000 lb/axle = 4% 3-axle or more, 23,000 lb/axle = 3% Tractor semitrailers and combinations: 3-axle, 20,000 lb/axle = 3% The projected AADT during the first year of operation is 3,900 (both directions). If the traffic growth rate is estimated at 3 percent and the CBR of the subgrade is 7.5, determine the depth of a full- asphalt pavement (in inches) using the AASHTO method and n = 20 years. The resilient modulus of the asphalt (EAC) is 320,000 lb/in². Assume m, for the subgrade is 1 and the percent of traffic on the design lane is 42 percent, p₁ = 2.5, and SN = 4. Use a reliability level of 90 percent, a standard deviation of 0.45, and a design serviceability loss of 2.0. Assume the design lane factor f is 0.42. (Use single-axle load equivalency factors for 2-axle vehicles and tandem-axle load equivalency factors for…