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 Annual Average Daily Traffic (AADT) during the first year of operation is 3,900 (both directions). If the traffic growth rate is estimated at 3 percent and the California Bearing Ratio (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 (\( E_{AC} \)) is 320,000 lb/in². Assume \( m_i \) for the subgrade is 1 and the percent of traffic on the design lane is 42 percent, \( p_t = 2.5 \), 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 \( f_d \) is 0.42. (Use single-axle load equivalency factors for 2-axle vehicles and tandem-axle load equivalency factors for 3-axle vehicles.)[Input box for answer] inches

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 avement (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 i 2 percent, p, 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 3-axle vehicles.) inches

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 avement (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 i 2 percent, p, 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 3-axle vehicles.) inches

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) = 65% 2-axle single unit trucks (22.2kN/axle) = 24% 2-axle single unit trucks (40kN/axle) = 6% 3-axle or more single-unit trucks (100kN/axle) = 3% 3-axle or tractor semitrailers and combinations (90kN/axle) = 2% The projected AADT during the first year of operation is 4000 (in both directions). If the traffic growth rate is estimated at 4%, the percent of the traffic on the design lane is 43%, pt =2.5, and SN =3, calculate the design ESAL at the design life of 25 years.
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