Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Question
Chapter 19, Problem 4P
To determine
The truck factor for the section of highway.
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Students have asked these similar questions
An axle weight study on a section of highway gave the following data on axle load distribution. Determine the truck factor for this section of highway. Assume
SN = 4
and
pt = 2.5.
A. Given
Design years for 2 direction of road
Number of lanes. 2 lanes
ADT - 3500
Calculate the ESAL for one direction of road
20 years
Wheel Load (kN) Equivalent Load Factors % in total traffic volume
45
0.03
25
20
0.044
16
150
15
8
80
2.5
25
165
25
21
285
42
2.
Q5. Given the following information: A concrete pavement for two lane highway has doweled
joints and no concrete shoulders. The modulus of subgrade reaction is 200 pci (54.2MN/m3),
and the modulus of rupture is 650 psi (4.5Mpa). Assume a load safety factor of 1.1. truck weight
distribution data for single axle load is as follows:
Axle load(kips)
1
Single axles
28
Multiplied by LSF
(1.1)
26
24
2
Expected
repetitions
3
Erosion analysis
Allowable
repetitions
30.8
5,913
28.6
12,483
26.4
15,111
22
24.2
102,492
Using a trial thickness of 8 in. Fill in the empty spaces using PCA design method
4
6. Erosion factor
Erosion
percent
5
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- Calculate ESAL in the design lane for 20 year design period for asphalt (assume TSI= 2.5) and concrete (assume TSI= 2.5 and D = 9 inch) pavement, respectively, based on the initial traffic of single axle-loads shown below, given that the yearly rate of growth 2%, Direction Distribution Factor -50%, Lane Distribution Factor = 75% Axle Load Number (kip) 18 20 22 24 26 28 30 32 34 per day 61.4 47.2 21.4 12.9 6.1 2.9 1.2 0.7 0.3arrow_forwardAn axle weight study on a section of highway gave the following data on axle load distribution. Determine the truck factor for this section of highway. Assume SN = 4 and pt = 2.5. Axle Load Group:Single (1,000 lb) No. of Axles per1,000 Vehicles Axle LoadGroup: Tandem (1,000 lb) No. of Axles per1,000 Vehicles 4 686 4 18 6 753 10 242 10 495 16 175 14 152 22 122 18 62 28 151 20 41 32 67 22 7 34 31 24 4 36 12 26 3 38 4 40 1 truck factor =arrow_forwardAn axle weight study on a section of highway gave the following data on axle load distribution. Determine the truck factor for this section of highway. Assume SN = 4 and p₁ = = 2.5. truck factor = Axle Load Group: Single (1,000 lb) 4 6 10 14 18 20 22 24 26 No. of Axles per 1,000 Vehicles 675 776 496 152 59 41 7 4 3 Axle Load Group: Tandem (1,000 lb) 4 10 16 22 28 32 34 36 38 40 No. of Axles per 1,000 Vehicles 18 233 171 122 153 64 31 12 4 1arrow_forward
- A traffic surveying conducted on a road yield an average daily traffic count of 5000 vehicle. The axle load distribution on the same road is given in the following table. Axle load (tones) Frequency of traffic (f) 18 10 14 20 10 35 8 15 6 20 ... The design period of the road is 15 years. The yearly Traffic growth rate is 7.5% the load safety factor (LSF) is 1.3. If the vehicle damage factor (VDF) is calculated from the above data, the design traffic (In million standard axle load MSA) isarrow_forwardThis is a type of load varies in length when getting the maximum internal forces of a structure. O Axle Loads O Moving load O Dead Load O Live Loadarrow_forwardA common passenger car has two single axles with 2-kip load on each. A truck has tandem axles and one single axle. The tandem axles carry 48-kip load on each axle. The single axle of the truck carries 14 kip. If SN=5, P= 2.5, how many passenger cars produce the equivalent damage of one truck on flexible pavement?arrow_forward
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