PRIN.OF HIGHWAY ENGINEERING&TRAFFIC ANA.
7th Edition
ISBN: 9781119610526
Author: Mannering
Publisher: WILEY
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Chapter 6, Problem 32P
To determine
The total directional volume.
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Problem
Determine the level of service? for six lanes undivided level highway. The
width of lane, shoulder on the right side, and shoulder on the left side are 10 ft,
2 ft, and 2 ft respectively. The directional hour volume is 3500 Veh/h. The traffic
composition includes 15% trucks and 1% RVs. The peak hour factor is 0.80.
Unfamiliar drivers use the road that has 10 access points per mile. The design
speed is 55 mi/h.
Discuss possible modifications to upgrade the level of service? (Verify your
answer)
Answer fast
A six-lane freeway (three lanes in each direction) currently operates at maximum LOS C conditions. The lanes are 11 ft wide, the right-
side shoulder is 4 ft wide, and there are two ramps within three miles upstream of the segment midpoint and one ramp within three
miles downstream of the segment midpoint. The highway is on rolling terrain with 10% heavy vehicles, and the peak-hour factor is
0.90. Determine the hourly volume for these conditions in veh/h. Round of your answer to whole number. Blank 1
Chapter 6 Solutions
PRIN.OF HIGHWAY ENGINEERING&TRAFFIC ANA.
Ch. 6 - Prob. 1PCh. 6 - Prob. 2PCh. 6 - Prob. 3PCh. 6 - Prob. 4PCh. 6 - Prob. 5PCh. 6 - Prob. 6PCh. 6 - Prob. 7PCh. 6 - Prob. 8PCh. 6 - Prob. 9PCh. 6 - Prob. 10P
Ch. 6 - Prob. 11PCh. 6 - Prob. 12PCh. 6 - Prob. 13PCh. 6 - Prob. 14PCh. 6 - Prob. 15PCh. 6 - Prob. 16PCh. 6 - Prob. 17PCh. 6 - Prob. 18PCh. 6 - Prob. 19PCh. 6 - Prob. 20PCh. 6 - Prob. 21PCh. 6 - Prob. 22PCh. 6 - Prob. 23PCh. 6 - Prob. 24PCh. 6 - Prob. 25PCh. 6 - Prob. 26PCh. 6 - Prob. 27PCh. 6 - Prob. 28PCh. 6 - Prob. 29PCh. 6 - Prob. 30PCh. 6 - Prob. 31PCh. 6 - Prob. 32PCh. 6 - Prob. 33PCh. 6 - Prob. 34PCh. 6 - Prob. 35PCh. 6 - Prob. 36PCh. 6 - Prob. 37P
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- A six-lane freeway (three lanes in each direction) currently operates at maximum LOS C conditions. The lanes are 11 ft wide, the right-side shoulder is 4 ft wide, and there are two ramps within three miles upstream of the segment midpoint and one ramp within three miles downstream of the segment midpoint. The highway is on rolling terrain with 10% heavy vehicles, and the peak-hour factor is 0.90. Determine the hourly volume for these conditions in veh/h. Round of your answer to whole number. fLW = 1.9, fRLC = 0.80, PHF = 0.90, N = 3 lanes PT = 0.10, ET = 3.0.arrow_forwardA freeway is being designed to carry a heavy volume of 5000 veh/h on a regular weekday in rolling terrain. If the PHF is 0.9 and the traffic consists of 90% passenger cars and 10% trucks, determine the number of 12-ft lanes required in each direction if the highway is to operate at level of service C. The free-flow speed is 70 mi/h, there is no lateral obstruction, and interchanges are 3 mi apart.arrow_forwardClass I two-lane highway is on rolling terrain and the free-flow speed was measured at 56 mi/h, but this was during a two-way flow rate of 275 veh/h. There are 80% no-passing zones. During the peak hour, the analysis direction flow rate is 324 veh/h, the opposing direction flow rate is 216 veh/h, and the PHF = 0.87. There are 5% large trucks and buses and 10% recreational vehicles. Determine the level of service.arrow_forward
- An existing six-lane divided multilane highway with a field-measure free-flow speed of 45mph serves a peak-hour volume of 4,000 vehicles per hour, with 10% trucks (50% SUT, 50% TT). The PHF is 0.88. The highway has generally rolling terrain. What is the likely level of service for this segment? Good weather, no incidents, no work zones, and regular drivers may be assumed.arrow_forwardA class I two-lane highway is on Rolling terrain with a measured free-flow speed of 90 km/h. and 80% no passing zones. The analysis direction flow rate is 324 veh/h, the opposing direction flow rate is 216 veh/h, and the PHF = 0.87. There are 5% large trucks and 10% recreational vehicles. Determine the level of services.arrow_forwardEight lane urban freeway is on level terrain with lane width of 12 ft, right shoulder lateral clearance of 4 ft, and 12 ramps over the 6-mi analysis segment. The traffic stream consists of unfamiliar road users. Peak hour volume for a directional weekday of 3200 vehicles is observed with 900 vehicles arriving in the most congested 15-min period. If the traffic stream has 20% large trucks and 20% buses and 15% recreational vehicles, determine the density in pc/mi/In. Round your answer to 3 decimal places. Exclude the unit in the answer box.arrow_forward
- A multilane highway (two lanes in each direction) is on level terrain. The free-flow speed has been measured at 45 mi/h. The peak-hour directional traffic flow is 1300 vehicles with 8% heavy vehicles. If the peak-hour factor is 0.85, determine the highway’s level of service. Answer: LOS:Carrow_forwardA multilane highway (three lanes in each direction) is on level terrain. The free flow speed has been measured at 50mph. The peak-hour directional volume is 1500 vehicles with 10% heavy vehicles, and PHF is 0.9. If the proportion of vehicles types and peak-hour factor remains constant, how many vehicles can be added to the directional volume before capacity is reached?arrow_forwardProblem 2: A Class III two-lane highway is on level terrain, has a measured free-flow speed of 45 mi/h, and has 100% no-passing zones. During the peak hour, the analysis direction flow rate is 150 veh/h, the opposing direction flow rate is 100 vehh, and the PHF = 0.95. There are 5% large trucks and 10% recreational vehicles. Determine the level of service.arrow_forward
- (TRAFFIC AND HIGHWAY ENGINEERING) An undivided multilane highway segment has two 11-ft lanes in the eastbound direction with no shoulders and a 55 mi/h speed limit. This highway segment has 40 access points on a 1.25-mile, 2.5% upgrade. During the highest 15 minutes of traffic flow within the peak hour, there are 755 vehicles and 12% of these are heavy vehicles with a 70%/30% mix of single-unit and tractor-trailer trucks. What are the estimated speed, density, and LOS of upgrade?arrow_forwardA divided multilane highway in a recreational area has four lanes (two lanes in each direction) and is on rolling terrain. The highway has 10-ft lanes with a 6-ft right-side shoulder and a 3-ft left-side shoulder. The posted speed is 50 mi/h. Previously, there were 4 access points per mile, but recent development has increased the number of access points to 12 per mile. Before development, the peak-hour factor was 0.95, and the directional hourly volume was 2200 vehicles with 13% heavy vehicles. After development, the directional hourly volume is 2600 vehicles with the same vehicle percentages and peak-hour factor. What is the LOS before and after the development?arrow_forwardA six-lane urban freeway (three lanes in each direction) is on rolling terrain with 11-ft lanes, obstructions 2 ft from the right edge of the traveled pavement, and nine ramps within three miles upstream and three miles downstream of the midpoint of the analysis segment. The traffic stream consists primarily of commuters. A directional weekday peak-hour volume of 2300 vehicles is observed, with 700 vehicles arriving in the most congested 15-min period. If the traffic stream has 15% large trucks and buses and no recreational vehicles and at some point, further along the roadway there is a 6% upgrade that is 1.5 mi long. (assuming that the proportion of vehicle types and the peak-hour factor remain constant) Determine the FFS value in mi/hDetermine the PHF or Peak Hour FactorDetermine the fHVDetermine the value of vparrow_forward
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