A traffic surveying conducted on a road yield an average daily traffic countof 5000 vehicle. The axle load distribution on the same road is given in thefollowing table.Axle load (tones) Frequency of traffic (f)181014201035815620...The design period of the road is 15 years. The yearly Traffic growth rateis 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 axleload MSA) is

Given:Design periodn=15 yearsTraffic growth rater=7.5%Load safety factorLSF=1.3Load distribution…

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 15 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 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 15 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

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter6: Fundamental Principles Of Traffic Flow

Section: Chapter Questions

Problem 23P

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Given the data below: Daily Traffic Count Axle Load (Kips) 1000 (single axle cars) 300 (single axle buses) 120 (tandem axle trucks) SN is 5, Pi = 4.2, 22 40 Pr = 3, design life is 20 years, growth rate is 5%, lane distribution factor = 0.45 %3D Calculate the ESAL.
Following table shows the prediction in the traffic of the road for a design period. Which one is the closest number to the design ESAL (W18) for this road (total ESAL) Load Number of Vehicle Type Equivalency Repeats Factor Compact car 0.0008 48,857,994 Buss 1.75 84,590 2 AX 0.7 497,585 З АХ 1.5 149,276 4 AX 2 84,590 5 AX 2.3 84,611 TAX (10,000 Ibs) 0.011 14,659 TAX (14,000 Ibs) 0.042 86,231 TAX (18,000 Ibs) 0.109 25,869 TAX (20,000 Ibs) 0.162 14,650 TAX (50,000 Ibs) 5.03 1,524 O 2.5 million O 0.75 million O 1.26 million 1.14 million
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…
A traffic survey conducted on a road yields an average daily traffic count of 5000 vehicles. The axle Load distribution on the same road is given. in the following table: Axle Load (tonnes) 18 14 10 8 6 Frequency of traffic (%) 10 20 35 15 20 The design period of the road is 15 years, the yearly traffic growth rate is 7.5% and 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
Q3/Traffic volume study was conducted in a section of road in month of April the following information's was obtained (HEF =18, POV =650 veh/h , total weekly volume =72450 veh/week , total yearly volume = 23770 veh /year , MEF =1/2 DEF ). Determine the ADT of this month? Assume total daily volume = average daily volume.
Given the data below: Daily Traffic Count Axle Load (Kips) 1000 (single axle cars) 300 (single axle buses) 120 (tandem axle trucks) 100 (tandem axle trucks) 50 (triple axle trucks) 22 40 50 50 SN is 5, P = 4.2, P; = 3, design life is 20 years, growth rate is 5%, lane distribution factor = 0.45 EASL Calculate the !
Question 2 Because the new travel time rate (TTR) from the additional traffic (e.g., 300vph) exceeds the minimum acceptable local standard of 2.0 min/mile, it is proposed to increase the road capacity by 900vph/lane by adding one lane in each direction. Calculate the new travel time rate and traffic volume using: a. The traditional method of traffic impact analysis, and b. The above-mentioned pivot point analysis method. c. Compare the results of the two methods and comment on their significance.
Q3/Traffic volume study was conducted in a section of road in month of April the following information's was obtained (HEF =18, POV =650 vehh, total weekly volume =72450 veh week , total yearly volume = 23770 veh /year , MEF =1/2 DEF ). Determine the ADT of this month? Assume total daily volume = average daily volume.
Q4/ An 6 lane divided highway is to be constructed on a new alignment. Traffic volume forecasts indicate that the AADT in each directions during the first year of operation will be 8000, with the following vehicle mix and axle loads:- 出E ( 258 kN / axle ) = 40% ( 160.1 kN / axle ) = 60% Traffic growth = 0.04 , Design life = 20 years Calculate ESAL?
Design Speed. If the AADT of a mountainous road section is 1600, and is expected to increase by 4% per year and the road is expected to last 15 years what would be the appropriate class of the road section if we are going to account the yearly increase? (Just indicate the number) *
: An existing rural four-lane highway is to be replaced by a six-lane divided expressway (three lanes in each direction). Traffic volume data on the highway indicate that the AADT (both directions) during the first year of operation is 24,000 with the following vehicle mix and axle loads. Passenger cars (2,000 lb/axle) = 50% & Axle load equivalency factor is 0.0002 2-axle single-unit trucks (12,000 lb/axle) = 40% & Axle load equivalency factor is 0.174 3-axle single-unit trucks (16,000 lb/axle) = 10% & Axle load equivalency factor is 0.603 The vehicle mix is expected to remain the same throughout the design life of 20 years, although traffic is expected to grow at a rate of 3.5% annually. Using the PCA design method, if the subgrade k value is 50 lb/in3 and a 6 in. stabilized subbase is used. The modulus of rupture of the concrete is 600 lb/in2 and the pavement has aggregate interlock joints (that is, no dowels) and a concrete shoulder. Determine the minimum depth of concrete pavement…
Current truck traffic volumes (in AADTT) for a six-lane highway are shown in the table below. An asphalt pavement with a 20 year design life is to be designed according to the Hveem method. It is assumed that traffic volumes for each truck classification will grow linearly by 20 percent over the next 20 years. Current traffic Expanded Vehicle Type ESAL constant 20 year ESAL volume (AADTT) Volume 2-axle trucks 500 3-axle trucks 300 4-axle trucks 150 5-axle or more trucks 750 Total