A flexible pavement (SN = 4) is to be designed to last 10 years. The daily car traffic is 28,753, and the daily truck traffic is 1,370 single-unit trucks with two single axles and 277 tractor semi-trailer trucks with single, tandem, and triple axles. The axle weights are: cars: two (one front, one back) 2000-lb single axles single-unit truck: 8000-lb, single axle (front), 22,000-lb, single axle (back) tractor semi-trailer truck: 10,000-lb single axle, 16,000-lb tandem axle, 44,000- lb triple axle Calculate the 18-kip equivalent single axle load for the total traffic over the design period. (round your answer to the nearest whole number)

A flexible pavement (SN = 4) is to be designed to last 10 years. The daily car traffic is 28,753, and the daily truck traffic is 1,370 single-unit trucks with two single axles and 277 tractor semi-trailer trucks with single, tandem, and triple axles. The axle weights are: cars: two (one front, one back) 2000-lb single axles single-unit truck: 8000-lb, single axle (front), 22,000-lb, single axle (back) tractor semi-trailer truck: 10,000-lb single axle, 16,000-lb tandem axle, 44,000- lb triple axle Calculate the 18-kip equivalent single axle load for the total traffic over the design period. (round your answer to the nearest whole number)

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter21: Pavement Management

Section: Chapter Questions

Problem 10P

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Q1) If the traffic using the pavement grows at an annual rate of 4 present ,determine the design ESAL for 20 years, if ESAL for one year =78900?
You have been asked to design a flexible pavement and the following daily traffic is expected for design: 6375 passenger cars with two 2-kip single axles, 375 18-wheel trucks with one 12-kip single axle and two 32-kip tandem axles, 225 triple-trailer trucks with one 18-kip single axle and six 36-kip tandem axles, and 525 single unit trucks with one 10-kip single axle and one 24-kip tandem axle. There are 3 lanes in the design direction (conservative design is to be used). Assuming a structural number of 5.0, determine the design-lane 18-kip ESALs for the pavement projected 15-year design life with the TSI of 2.5.
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Show transcribed image text 1. Truck A has two single axles. One axle weighs 12,000 Ib and the other weighs 23,000 lb. Truck B has an 8000-lb single axle and a 43,000-lb tandem axle. On a flexible pavement with a 3-inch hot-mix asphalt (HMA) wearing surface, a 6-inch soil-cement base, and an 8-inch crushed stone sub base, which truck will cause more pavement damage? (Assume drainage coefficient are 1.0.) Hints: use linear interpolation if SN is not integer. 2. A highway has the following pavement design daily traffic: 300 single axles at 10,000 lb each, 120 single axles at 18,000 lb each, 100 single axles at 23,000 Ib each, 100 tandem axles at 32,000 lb each, 30 single axles at 32,000 lb each, and 100 triple axles at 40,000 lb each. A flexible pavement is designed to have 4 inches of sand-mix asphalt wearing surface, 6 inches of soil- cement base, and 7 inches of crushed stone sub base. The pavement has a 10-year design life, a reliability of 85%, an overall standard deviation of 0.30,…
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A rigid pavement of 25 cm thickness of M40 grade of concrete is supported over a subgrade having modulus of subgrade reaction as 8.0 kg/cm³. If dowel bars are placed at centre-to-centre spacing of 30 cm, calculate the maximum load carried by a single dowel which is just below the wheel. Assume wheel load as 4100 kg, participation of dowel bars in load distribution up to 1.0 x radius of relative stiffness. and load to be transferred by joint as 50%. Poisson's ratio of the concrete may be taken as 0.15.
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12. Refer to Figure II-1 attached. A flexible pavement is to be evaluated according to the AASHTO 1972 design guide. The existing pavement has a weighted structural number=3.4, a regional factor=2.0, and a soil support value=4.5. What would be the approximated number of daily equivalent 18-kip axles to be allowed on this road for a 20-year analysis period?a. 10b. 33c. 100d. 1490
You have been asked to design the pavement for an access highway to a major truck terminal. The design daily truck traffic consists of the following: 80 single axles at 22,500 lb each, 570 tandem axles at 25,000 lb each, 50 tandem axles at 39,000 lb each, and 80 triple axles at 48,000 lb each. The highway is to be designed with rigid pavement having a modulus of rupture of 600lb/in2 and a modulus of elasticity of 5 million lb/in2. The reliability is to be 95%, the overall standard deviation is 0.4, the drainage coefficient is 0.9, ¨PSI is 1.7 (with a TSI of 2.5), and the load transfer coefficient is 3.2. The modulus of subgrade reaction is 200 lb/in3. If a 20-year design life is to be used, determine the required slab thickness
A flexible pavement has the following class of loads during a particular hour of the day. i. 80 buses with 2-axles (each axle load of 40 KN); ii. 160 trucks with 2-axles (front and rear axle loads of 40 kN and 80 kN, respectively) The equivalent standard axle load repetitions for this vehicle combination as per IRC: 37-2012 would be
A flexible pavement has the following class loads during a particular hour of the day. i. ii. 80 buses with 2-axles (each axle load of 40 kN) ; ii. 160 trucks with 2-axles (from and rear axle loads of 40 kN and 80 kN, respectively) Find the equivalent standard axle load repetitions for this vehicle combination as per IRC 37-2012.