Principles of Highway Engineering and Traffic Analysi (NEW!!)
6th Edition
ISBN: 9781119305026
Author: Fred L. Mannering, Scott S. Washburn
Publisher: WILEY
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Question
Chapter 6, Problem 42P
To determine
The analysis flow rate.
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A segment of rural freeway is being designed for a FFS of 70 mph through rolling terrain. The directional (i.e. one-way) design volume is 3,000 vehicles per hour. If 10% of the design volume is expected to be heavy vehicles (i.e. trucks and buses), what is the heavy vehicle adjustment used to determine the flow rate? Provide you answer to the nearest hundredths.
Eight 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 exact demand flow rate
(in pc/h/In). Round your answer to 3 decimal places. Exclude the unit in the answer box.
Eight 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.
Chapter 6 Solutions
Principles of Highway Engineering and Traffic Analysi (NEW!!)
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. 37PCh. 6 - Prob. 38PCh. 6 - Prob. 39PCh. 6 - Prob. 40PCh. 6 - Prob. 41PCh. 6 - Prob. 42PCh. 6 - Prob. 43P
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- Eight lane urban freeway is on mountainous 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 familiar road users. Peak hour volume for a directional weekday of 5200 vehicles is observed with 500 vehicles arriving in the most congested 15-min period. If the traffic stream has 10% large trucks and 12% buses and 10% recreational vehicles, determine the density in pc/mi/In. Round your answer to 3 decimal places. Exclude the unit in the answer box.arrow_forwardAn existing 6-lane (3-lanes in each direction) divided multilane highway with a free flow speed of 45 mph has expected peak hourly volumes of 4000 vph, with 15% trucks, and no buses or RVs. The PHF is 0.90. The highway in question is in generally rolling terrain. a. Find the traffic flow rate in units of vph b. Find the heavy vehicle factor in veh/pc c. Find the demand flow rate in units of pcphplarrow_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
- The following figure shows the Level of Service (LOS) criteria for a multilane highway segment. If the free flow speed is 45 mph and the analysis flow rate is 1800 passenger cars per hour per lane (pc/h/In). What is the actual speed and density of the traffic flow at this specific location? What is the LOs of the location? 70 free-flow Seed 60 mih 56 mi 50 mih 45 mih LOS A 60 50 40 30 20 pomit 45 400 800 1200 1600 2000 2400 Flow Rate (pc/h/in) (uju) paads eg-buasseg abeanyarrow_forwardQUESTION 4 A segment of rural freeway is being designed for a FFS of 70 mph through rolling terrain. The directional (i.e. one-way) design volume is 3,000 vehicles per hour. If 10% of the design volume is expected to be heavy vehicles (i.e. trucks and buses), what is the heavy vehicle adjustment used to determine the flow rate? Provide you answer to the nearest hundredths.arrow_forward1) A 6-lane two-way arterial road has a maximum flow of 6,000 vehicles per hour on one direction. It is operating at 3,600 vehicles per hour at time, t=0. A collision occurs, blocking the two lanes, and restricting the flow of the outermostlane to 1,600 vehicles per hour. After 40minutes, the police have cleared the middlelane from accident debris; the operating volume at that time increased to 2,400 vehicles per hour.20 minutes past, the innermost lane was finally cleared of the accident. Traffic returns to normalas soon as the queue has already immoderate. a.Determine the maximum length of queue that occurred. b.How long did it take to dissipate the queue? c.If a vehicle entered the road at t=10 minutes, how long will it take for it to leave the traffic?arrow_forward
- A six-lane freeway (three lanes in each direction) in mountainous terrain has 10-ft lanes and obstructions 1 ft from the right edge. There are five ramps within three miles upstream of the segment midpoint and four ramps within three miles downstream of the segment midpoint. The traffic stream consists of mostly commuters with a peak hour factor of 0.84, peak-hour volume of 2500 vehicles, and 4% recreational vehicles. What is the level of service? (Write the letter only)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_forwardA rural freeway has two lanes in each direction of flow. Each lane is 3.6 m wide and the shoulder clearance is 1.2 m. The freeway has interchanges spaced at 5 km apart. The traffic stream consists of 10% trucks and 8% RVs. An estimated factor for the driver population is 0.8. Given the maximum 15 minutes flow (i.e. PHF has already been factored) is 1 760 veh/h, determine the level of service of the freeway (consider typical Namibian condition).arrow_forward
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