A flexible two-way roadway (as shown below) has two lanes each way with a two-way annual average daily traffic (AADT) of 5,250 in 2017 and 5,460 in 2018. The traffic information can be found as listed in the table below (SN= 4, P= 2.5). The pavement is to be designed for a design life of 20 years starting from 2018. Determine the design ESAL in the driving lane. Two-way AADIT in 2017-5,250 Two-way AAD1T in 2018 3,460 Median Car type Passenger Car 7% Axle type Axle load (kips) 50 Single 12 Truckl 30 Tandem 38 Truck2 20 Triple 60

A flexible two-way roadway (as shown below) has two lanes each way with a two-way annual average daily traffic (AADT) of 5,250 in 2017 and 5,460 in 2018. The traffic information can be found as listed in the table below (SN= 4, P= 2.5). The pavement is to be designed for a design life of 20 years starting from 2018. Determine the design ESAL in the driving lane. Two-way AADIT in 2017-5,250 Two-way AAD1T in 2018 3,460 Median Car type Passenger Car 7% Axle type Axle load (kips) 50 Single 12 Truckl 30 Tandem 38 Truck2 20 Triple 60

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 8P

See similar textbooks

Similar questions

Calculate the design traffic in million standard axles (MSA) and commercial vehicles per day (CVD) required for design of flexible pavement as per current Indian procedure (revised IRC method) for the following data: (i) Annual daily commercial vehicles at last count (May 2008) = 200 (ii) Rate of traffic growth = 6% (iii) Design life = 10 years (iv) Vehicle damage factor = 2 (v) The road is proposed to be completed in May 2011.
The traffic projection for a new pavement of a two-lane rural dual carriageway is as follows: Design period = 25 years AADT in current year = 5000 vehicles per day Direction factor = 0.5 Percent of heavy vehicles = 6% Annual traffic growth = 6% Damage index: ESA/HVAG = 0.75; SAR5/HVAG = 0.95; SAR7/HVAG = 1.65; SAR12/HVAG = 19.65. %3D %3D Table 2 Traffic load distribution Load (kN) SAST SADT TAST TADT TRDT 70 0.21 0.12 0.31 0.18 0.21 80 0.34 0.29 0.21 0.48 0.41 90 0.45 0.59 0.48 0.34 0.38 Proportion of each axle group 0.136 0.294 0.315 0.103 0.152 a) Calculate the average number of axle groups per heavy vehicle NHvaG Using the data in the Table. b) Calculate the design traffic in HVAG (NDT). c) Calculate the design traffic in ESA, SAR5, SAR7 and SAR12.
Design is required for a new pavement to be constructed in 2010. The annual average daily traffic for commercial vehicles on the opening day will be 2000. Growth rate = 4% Design Life = 20 years Solve for the design traffic in msa using 2 decimal places.
A new four lane divided highway is to be constructed on a subgrade of CBR 1.8%. The ADT of commercial truck traffic based on the last count was 8000 (in both the directions). The directional split of traffic is 65:35. Vehicle Damage Factor (VDF) based on axle load survey was 3.0. The pavement section is to be designed for a life span of 15 years. The last traffic count was taken 1 year back and the project would be completed in 2 years from now. The growth rate of traffic = 8%. The design cumulative standard axles on the road will be equal to
The proposed roadway has the following specifications: 1) rural road 2) design speed = 50 kph 3) radius of curvature = 192m; 4) 3-lane two-way direction 5) use maximum superelevation, emax= 8% Calculate the superelevation rate and coefficient of friction to be implemented in the road design.
What is the K- design value for a roadway designed for 70 mph, and G₁--2.5% and G2=3.9%?
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:
Determine the L.O.S of the road if PHF = 0.88, D= 60%, K=O.11, V=115 kph? For an Existing 4 lane freeway having the following features: • Lane and shoulder width = 12 ft, 6 ft, weekday commuter • Percent of trucks and buses = 8% and 4% respectively and Et =2.5, Eb =2.2• AADT = 35200 veh/day, Assume lane capacity * 2000 pc/hr
section of a two-lane rural highway is to be realigned and replaced by a four-lane highway with a full-depth asphalt pavement. Consists of 40% trucks. If classification studies have shown that the truck factor can be taken as 0.45, design a suitable flexible pavement using the 1993 AASHTO procedure if the AADT on the design lane during the first year of operation is 1000. It is expected that construction will be completed five years from now, and pi =4.5 and pt = 2.5. Growth rate = 4%. Design life = 20 years. The pavement structure will be exposed to moisture levels approaching saturation 20% of the time, and it will take about one week for drainage of water. Effective CBR of the subgrade material is 7. CBR of the base and subbase are 70 (Mr=30000 lb/in2 ) and 22 (Mr=13500 lb/in2 ), respectively, and Mr for the asphalt mixture, 400,000 lb/in2 .
A section of a two-lane rural highway is to be realigned and replaced by a four-lane highway with a full-depth asphalt pavement. The AADT (both ways) on the existing section can be represented by 750 ESAL. It is expected that construction will be completed 5 years from now. If the traffic growth rate is 2 percent and the effective CBR of the subgrade on the new alignment is 9.0, determine a suitable depth of the asphalt pavement (in inches) using the AASHTO method. Take the design life of the pavement as 20 years. The resilient modulus of the asphalt (EAC) is 450,000 lb/in. ². Assume m; for the subgrade is 1 and the percent of traffic on the design lane is 45 percent. Use a reliability level of 90 percent, a standard deviation of 0.45, and a design serviceability loss of 2.0. 8.25 inches
A section of a two-lane rural highway is to be realigned and replaced by a four-lane highway with a full-depth asphalt pavement. The AADT (both ways) on the existing section can be represented by 750 ESAL. It is expected that construction will be completed 5 years from now. If the traffic growth rate is 2 percent and the effective CBR of the subgrade on the new alignment is 9.0, determine a suitable depth of the asphalt pavement (in inches) using the AASHTO method. Take the design life of the pavement as 20 years. The resilient modulus of the asphalt (EAC) is 450,000 lb/in.2. Assume mi for the subgrade is 1 and the percent of traffic on the design lane is 45 percent. Use a reliability level of 90 percent, a standard deviation of 0.45, and a design serviceability loss of 2.0.
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 0.3