A new section of Richmond Highway is being designed as a six-lane facility (three in each direction) with a two-way left-turn lane. Determine the peak-hour LOS. Traffic data: • Directional design hourly volume = 3600 veh/h • PHF = 0.94 • Assumed base free-flow speed = 55 mi/h (88 km/h) Geometric data: • Urban setting • Rolling terrain • Lane width = 11 ft (3.3 m) • Shoulder widths = 4 ft (1.2 m) (right side) and 1 ft (0.3 m) (left side) • Average access point spacing = 12 points per mile on each side

A new section of Richmond Highway is being designed as a six-lane facility (three in each direction) with a two-way left-turn lane. Determine the peak-hour LOS. Traffic data: • Directional design hourly volume = 3600 veh/h • PHF = 0.94 • Assumed base free-flow speed = 55 mi/h (88 km/h) Geometric data: • Urban setting • Rolling terrain • Lane width = 11 ft (3.3 m) • Shoulder widths = 4 ft (1.2 m) (right side) and 1 ft (0.3 m) (left side) • Average access point spacing = 12 points per mile on each side

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter9: Capacity And Level Of Service For Highway Segments

Section: Chapter Questions

Problem 4P

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Similar questions

A new section of Richmond Highway is being designed as a six-lane facility (three in each direction) with a two-way left-turn lane. Determine the peak-hour LOS. (Assume commuter traffic, 5% trucks, and no RVs.) Traffic data: demand volume = 3,120 veh/h PHF = 0.95 assumed base free-flow speed = 55 mi/h Geometric data: urban setting rolling terrain lane width = 11 ft shoulder widths = 4 ft (right side) and 1 ft (left side) average access point spacing = 12 points per mile on each side LOS A LOS B LOS C LOS D LOS E LOS F
A new section of Richmond Highway is being designed as a six-lane facility (three in each direction) with a two-way left-turn lane. Traffic data include directional design hourly volume = 3600 veh/h, PHF = 0.94, assumed base free-flow speed = 55 mi/h (88 km/h). Geometric data include: urban setting, rolling terrain, lane width = 11 ft (3.3 m), shoulder widths = 4 ft (1.2 m) (right side) and 1 ft (0.3 m) (left side), and average access point spacing = 12 points per mile on each side.
A six-lane freeway (three lanes in each direction) has regular weekday users and currently operates at maximum LOS C conditions. The lanes are 3.5m wide, the right-side shoulder is 1.2 m 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% large trucks and buses (no recreational vehicles), and the peak-hour factor is 0.90. a) Determine the hourly volume for these conditions. b) At one point along this freeway, there is a 4% upgrade with a directional hourly traffic volume of 5000 vehicles. How long can this grade be without the freeway LOS dropping to F?
A 960 m segment of 5.2 km four-lane undivided multilane highway in a suburban area is at a 1.5% grade. The highway is in level terrain and lane widths are 3.35 m. The measured free flow speed is 73 km/hr. The peak hour volume is 1900 veh/hr, PHF is 0.9 and there are 13% truck and 2% RVs. Determine the LOS, speed, and density for upgrade and downgrade.
Given four lane urban freeway, directional peak flow 1950 veh/hr. 5% truck PHF-0.9 rolling terrain with ideal condition for the road. Determine:1- Level of service of the operation. 2- How much additional traffic before reaching capacity
A six lane undivided highway (three lanes in each direction) road on a level terrain has 3.4 m lanes, 1.2 m obstruction within the right edge and 0.6 m obstruction within the left edge lateral clearance of the traveled pavement, with 12.4 access points per kilometer. The posted speed is 84.06. Hourly volume averages on a 3,712 vehicles and 772 on the most congested 15-min period. If 11.84% and34.35% contains the traffic stream for heavy vehicles and recreational vehicles, compute the original free flow speed.
A four-lane undivided multilane highway (two lanes in each direction) has 11-ft lanes, 4-ft shoulders, and 10 access points per mile. It is determined that the roadway currently operates at capacity with PHF= 0.80 and a driver population adjustment of 0.9. If the highway is on level terrain with 8% large trucks and buses (no recreational vehicles) and the speed limit is 55 mi/h, what is the directional hourly volume?
A four-lane rural freeway segment has a 510 m grade length of 2% upgrade followed by a 630 m grade length of 3%. The freeway has 3.4-m lane, 1.5m left-shoulder lateral clearances and interchanges spaced at every 25 km. During the peak hour, there are 6% trucks, 2% buses, 2% recreational vehicles and the rest are passenger cars. Driver population adjustment is determined to be 0.90, peak hour factor is 0.90 and the BFFS is 110 km/h. At present, the freeway operates at capacity during the peak hour in the direction in question. If an additional 3.4 m lane is introduced, and all other factors stay the same, what will be the new level of service?
A six-lane freeway (three lanes in each direction) has regular weekday users and 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% large trucks and buses (no recreational vehicles), and the peak-hour factor is 0.90. b.) Determine the adjustment factor (f). (Express in three decimals)
(a) A six-lane freeway (three lanes in each direction) has regular weekday users and 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 rollingterrain with 10% large trucks and buses (no recreational vehicles), and the peak-hour factor is 0.90. Determine the hourly volume for these conditions.
A six-lane divided highway (three lanes in each direction) is on level terrain with 6 access points per kilometer and has 3.6-m lanes, with a 1.2-m shoulder on the right side and a 0.6-m shoulder on the left side. The peak-hour factor is 0.80, and the directional peak-hour volume is 3,500 vehicles per hour. There are 5% large trucks and 3% recreational vehicles. A significant percentage of non-familiar roadway users are in the traffic stream (the driver population adjustment factor is estimated as 0.85). No speed studies are available, but the posted speed limit is 80.5 km/h. Determine the level of service.
One segment of a Class I two-lane highway is on level terrain and has an hourly volume of 1200 veh/h (total for both directions), a directional traffic split of 50/50, and PHF = 0.92, and the traffic stream contains 5% large trucks, and 2% buses. It has 11-ft lanes, 2-ft shoulders, access frequency of 10 per mile, 50% no-passing zones, and a base FFS of 55 mi/h, determine the level of service for this two-lane highway segment.