An axle weight study on a section of highway gave t 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 p 1,000 Vehicle 695 783 498 151 62 39 7 4 3

An axle weight study on a section of highway gave t 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 p 1,000 Vehicle 695 783 498 151 62 39 7 4 3

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter19: Design Of Flexible Highway Pavements

Section: Chapter Questions

Problem 4P

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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.
Situation: A proposed four-lane divided highway is to be constructed using asphalt concrete surface layer. Table below shows the fvevRAr traffic data collected from DPWH regional office along the proposed alignment. Load per axle, Ibs 2,000 10,000 14,000 6,000 Vehicle Number of Description AADT Code axles В, В1, В2 12-2 12-3 Light Vehicles (sedan, SUV, pickup) Semi-trailer trucks Truck semi-trailer Public buses, single-unit trucks 75,000 4,000 1,500 15,700 5 D-4 2 Forecasted annual traffic growth Percentage of traffic on design lane Design service life of pavement = 4.Y% = 32% = 20 years Moreover, the regional office plans to adapt a flexible pavement with the following specifications listed below. Resilient modulus of asphalt concrete Resilient modulus of base course Resilient modulus of subbase course = 420 ksi California Bearing Ratio (CBR) of base course material California Bearing Ratio (CBR) of subbase material California Bearing Ratio (CBR) of subgrade material - 28.5 ksi = 15…
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 6.10
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) is
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%
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
4.7 PROBLEMS 4.7.3 Axle load study conducted on a stretch of road in 2017 yield theşe results: Axle load range (ton) 2 - 4 4 - 6 6 -8 8 - 10 10 - 12 12 – 14 No. of axle 500 710 599 621 452 168 Number of commercial vehicles for the particular day is 1860. Based on Road Note 31, determine: a) Average number of axle per commercial vehicle; b) Total equivalent standard axle for that particular day; c) Average number of standard axle per commercial vehicle; and d) Average number of standard axle per commercial axle.
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 Load
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 1
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?
A northbound direction on an interstate highway consists of three lanes of flexible pavement. The subgrade CBR is 4.5, the overall standard deviation is 0.38, and the reliability is 95%. The initial PSI is 4.5 and the final PSI is 2.5. Daily total northbound road traffic consists of 39,500 cars (each with two 2kip single axles), 775 buses ((each with two 19 kip single axles) and 1100 heavy trucks (each with two 10kip single axle and two 34kip tandem axles). If the pavement is designed to last for 20 years, what should be its structural number?
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: