A six-lane highway (3 lanes in each direction) is to be designed to replace an existing highway. The present AADT in one direction is 6000 and is expected to grow at 3% per year. The design life is 30 years and the vehicle mix is: Passenger cars (2000 lb/axle) = 60% 2-axle single unit trucks (6000 lb/axle) = 30% 3-axle single unit trucks (12000 lb/axle) = 10% 1) Determine the design ESAL using the AASHTO method. Exclude passenger cars. Assume SN = 4 and pt = 2.5. 2) Determine the design ESAL using CALTRANS method. Exclude passenger cars. Compare and comment on the result obtained from Problem 1. 3) Calculate the Traffic Index using Caltrans Method.

A six-lane highway (3 lanes in each direction) is to be designed to replace an existing highway. The present AADT in one direction is 6000 and is expected to grow at 3% per year. The design life is 30 years and the vehicle mix is: Passenger cars (2000 lb/axle) = 60% 2-axle single unit trucks (6000 lb/axle) = 30% 3-axle single unit trucks (12000 lb/axle) = 10% 1) Determine the design ESAL using the AASHTO method. Exclude passenger cars. Assume SN = 4 and pt = 2.5. 2) Determine the design ESAL using CALTRANS method. Exclude passenger cars. Compare and comment on the result obtained from Problem 1. 3) Calculate the Traffic Index using Caltrans Method.

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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Concept explainers

Quantity takeoff

Quantity takeoffs (QTO) are precise estimates of the materials and labor costs required to finish a construction project. During the pre-construction phase, an estimator prepares them, breaking down the project into smaller, more manageable parts that are easier to evaluate. These measurements are used to prepare a construction scope bid. Estimators examine the drawings, specifications, and models to figure out different quantities and their costs. Since, the components, their quantity, and price are all included in the model, quantity take-off can be done automatically using Building Information Modelling (BIM). The time taken for completing a construction project can be reduced by the use of quantity takeoff. These takeoffs are also called material takeoffs and construction takeoffs.

Question

A six-lane highway (3 lanes in each direction) is to be designed to replace an existing
highway. The present AADT in one direction is 6000 and is expected to grow at 3% per
year. The design life is 30 years and the vehicle mix is:
Passenger cars (2000 lb/axle) = 60%
2-axle single unit trucks (6000 lb/axle) = 30%
3-axle single unit trucks (12000 lb/axle) = 10%
1) Determine the design ESAL using the AASHTO method. Exclude passenger cars.
Assume SN = 4 and pt = 2.5.
2) Determine the design ESAL using CALTRANS method. Exclude passenger cars.
Compare and comment on the result obtained from Problem 1.
Calculate the Traffic Index using Caltrans Method.
3)

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