Traffic And Highway Engineering
5th Edition
ISBN: 9781133605157
Author: Garber, Nicholas J., Hoel, Lester A.
Publisher: Cengage Learning,
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Chapter 19, Problem 4P
To determine
The truck factor for the section of highway.
Expert Solution & Answer
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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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- 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. Axle Load Group: Single (1,000 lb) 4 No. of Axles per 1,000 Vehicles Axle Load Group: Tandem (1,000 lb) No. of Axles per 1,000 Vehicles truck factor = 6 10 14 18 20 22 24 26 696 796 513 152 61 41 7 4 3 4 10 16 22 28 32 34 36 38 40 18 241 168 116 153 64 29 12 4 1arrow_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 p = 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 695 783 498 151 62 39 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 18 243 171 122 151 68 29 12 4 1arrow_forwardCalculate 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_forward
- A 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_forwardHighway engineering civil engineering Question number (38)arrow_forwardA roadway project will be constructed in 2026 as flexible pavement, pt-2.5, expected SN= 4 and has a 20-year design life. Design work was done in 2021, with growth rate of 6%. The traffic survey gives axles loads shown in table above. Find the design ESAL according to AASHTO design method. Truck type Axle Category Type-1 1-single axle of 30 kips 1- tandem axle of 32 kips 1-single axle of 18 kips 2- tandem axle of 40 kips 1-single axle of 20 kips 1- tandem axle of 36 kips 1- tandem axle of 50 kips 2-single axle of 22 kips 1- tandem axle of 38 kips 2-single axle of 38 kips 1- tandem axle of 52 kips 2-single axle of 14 kips 1- tandem axle of 32 kips 1- triple axles of 50 kips 1-single axle of 40 kips 1- tandem axle of 32 kips CS Cams Typer triple axies of 58 kips Type-2 Type-3 Type-4 Type-5 Type-6 % Total AADT 9% 10% 7% 5% 3% 5% 4%arrow_forward
- A roadway project will be constructed in 2026 as flexible pavement, pt= 2.5, expected SN=4 and has a 20-year design life. Design work was done in 2021, with growth rate of 6%. The traffic survey gives axles loads shown in table above. Find the design ESAL according to AASHTO design method. Truck type Type-1 Type-2 Type-3 Type-4 Type-5 Type-6 Axle Category 1-single axle of 30 kips 1- tandem axle of 32 kips 1-single axle of 18 kips 2- tandem axle of 40 kips 1-single axle of 20 kips 1- tandem axle of 36 kips 1- tandem axle of 50 kips 2-single axle of 38 kips 1- tandem axle of 52 kips 2-single axle of 14 kips 1- tandem axle of 32 kips 1- triple axles of 50 kips 1-single axle of 40 kips 1- tandem axle of 32 kips Type-7 CS CamScanner triple axies of 58 kips J 2-single axle of 22 kips 1- tandem axle of 38 kips % Total AADT 9% 10% 7% 5% 3% 5% 4% 12:arrow_forwardA highway is projected to carry 16,000 vehicles per day (10% of which will be 3-axle trucks with an axle load equivalency factor of 0.088) upon opening and 4% growth rate over the next 25 years. If an estimated 40% of traffic is to be in the design lane, the number of ESALS to be used in pavement design is: O 1.84 x 106 O 2.57 x 106 O 2.57 x 107 O 8.57 x 105 O 6.42 x 106arrow_forwardRoad engineeringarrow_forward
- X=30arrow_forwardGiven data: 35% of traffic belongs to SAST group, LSF = 1.3, fcf = 4.5 MPa, NDT = 5e7 HVAGsarrow_forwardQuestion 4 a) The axle load data collected on a section of a highway for a short duration for 2 and 3 - axle trucks are presented in Table 1. Determine the ESAL per axle, total ESAL per truck and the truck factors for 2 and 3-axle trucks. Table 1: Axle load data Vehicle питber No. of axles Axle Weight (tons) Axle 3 Axle 4 Axle 5 Date Сommodity Axle 1 Axle 2 15-Jul-10 GR 6687 -10 16-Jul-10 GW 4925 S 15-Jul-10 AS 4602 Z 15-Jul-10 BA 4772 C 16-Jul-10 GR 2706 09 15-Jul-10 GR 9626 E 16-Jul-10 WR 9290 C 15-Jul-10 AS 6865 Q charcoal 3 4.00 10.20 5.20 13.60 16.80 cement 5.50 lumber 10.20 4.00 14.60 charcoal charcoal charcoal 2 6.10 4.20 14.20 8.50 19.80 13.20 charcoal 5.10 13.70 charcoal 8.40 14.90 6.10arrow_forward
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