In a traffic investigation, the total number of trucks weighed is 117. The detailed axle load information for these 235 trucks is listed in the table below. a- What is the average number of axles per truck? b- Calculate the truck factor for an asphalt pavement (assume Pt=2.5 and SN=5) If the initial design year ADT is 4,000, truck percentage is 20%, traffic annual growth rate is 2%, for an asphalt pavement (assume Pt-2.5 and SN=5) with two lanes in each direction, if the design period is 20 years, calculate the design ESALS. Axle Load (lb) Single Axles Tandem Axles Tridem Axles wwwwww 9000 12000 18000 20000 22000 20000 24000 26000 30000 30000 34000 38000 Number of axles 6 16 264 30 10 36 64 42 24 20 28 44

In a traffic investigation, the total number of trucks weighed is 117. The detailed axle load information for these 235 trucks is listed in the table below. a- What is the average number of axles per truck? b- Calculate the truck factor for an asphalt pavement (assume Pt=2.5 and SN=5) If the initial design year ADT is 4,000, truck percentage is 20%, traffic annual growth rate is 2%, for an asphalt pavement (assume Pt-2.5 and SN=5) with two lanes in each direction, if the design period is 20 years, calculate the design ESALS. Axle Load (lb) Single Axles Tandem Axles Tridem Axles wwwwww 9000 12000 18000 20000 22000 20000 24000 26000 30000 30000 34000 38000 Number of axles 6 16 264 30 10 36 64 42 24 20 28 44

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter21: Pavement Management

Section: Chapter Questions

Problem 4P

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Concept explainers

Asphalt Binders and Mixtures

Asphalt binders are subsidiary products procured during the refining process of petroleum while manufacturing gasoline, diesel, and similar petroleum products. Asphalt binders are obtained from the residue that remains after the distillation of petroleum, this residue is further subjected to steam distillation and oxidation to remove the traces of gas oil present in the residue. Certain additives or modifiers are also added to asphalt binders to alter them to suit different applications.

Question

In a traffic investigation, the total number of trucks weighed is 117. The detailed axle load
information for these 235 trucks is listed in the table below.
a- What is the average number of axles per truck?
b-
Calculate the truck factor for an asphalt pavement (assume Pt-2.5 and SN=5)
C- If the initial design year ADT is 4,000, truck percentage is 20%, traffic annual growth
rate is 2%, for an asphalt pavement (assume Pt-2.5 and SN=5) with two lanes in each
direction, if the design period is 20 years, calculate the design ESALS.
Axle Load (lb)
Single Axles
Tandem Axles
Tridem Axles
9000
12000
18000
20000
22000
20000
24000
26000
30000
30000
34000
38000
Number of axles
6
16
264
30
10
36
64
42
24
20
28
44

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