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.
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
A. Given
20 years
Design years for 2 direction of road
Number of lanes = 2 lanes
ADT = 3500
%3D
Calculate the ESAL for one direction of road
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
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- 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.arrow_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_forwardA 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_forward
- This 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_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 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_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 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_forwardThe truck drives on a horizontal road with a constant velocity. It eventually halted by a set of crash barrels. The number of barrels and sand within the barrels are arranged in such a way to decelerate the truck at a constant rate. Four test runs are performed where the velocity and mass of the truck are varied. In each of the following situations, the barrels stop the truck in the same amount of time. Which has the a. least force, b. greatest force.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_forward
- Question 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_forwardSubject : Transportation Engineering Read the question carefully and give me right solution according to the question. Note: solve by using 45-deg cone pressure distribution method only The maximum wheel load that the pavement could carry is 120 kN. If the contact radius of the wheel is assumed to be 250 mm, and subgrade bearing capacity is equivalent to 0.24 Megapascals, calculate the subgrade layer thickness of the flexible pavement in mm using the 45-deg cone pressure distribution method.arrow_forwardProblem Calculate the pavement width? for two directions divided highway. The current daily traffic count for one direction for four days is shown in the table below Traffic volume count for one direction Day No of passenger cars/day No of trucks & buses/day No of trucks with trailers Sunday 9047 4918 221 Monday 7959 3640 155 Tuesday 9890 3587 167 Wednesday 5879 4383 243 Assume Design period = 25 years, Traffic annual growth rate = 3%, K=0.10, lane capacity 1100 P.C.E/hr, lane width= 4m, shoulder width = 3m, and median width = 2m.arrow_forward
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