An eight-lane freeway has a basic freeway segment on rolling terrain. It has 12-ft lanes with a 4-ft right shoulder. There are seven ramps within the six-mile segment. The directional peak traffic volume is 5200 veh/h with 6% trucks and 2% buses. The PHF is 0.90. Calculate the FFS, vp , and determine the LOS
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- A four-lane basic freeway segment on level terrain is being redesigned. The current roadway has 12 ft lanes with 4 ft shoulders. The proposed alignment would expand to six 11-ft lanes with 2 ft shoulders. The road carries 3000 vehicles in the peak hour in one direction, with 925 coming in the peak 15 minutes. The truck mix is 70/30 and makes up 10% of traffic. What is the density and LOS (level of service) before and after the proposed change?A four-lane freeway (two lanes on each direction) is located on mountainous terrain with 11-ft lanes, a 5-ft right-side shoulder, and a 3-ft left-side shoulder, and a 60- mph design speed. The freeway currently operates at capacity during the peak hour. If an additional 11-ft lane is added, and all other factors stay the same, what will the new level of service be?A six-lane freeway (three lanes in each direction) in mountainous terrain has 10-ft lanes and obstructions 5 ft from the right edge. There are zero ramps within three miles upstream of the segment midpoint and one ramp 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?
- 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)A six-lane freeway (three lanes in each direction in mountainous terrain has 10-ft lanes and obstructions 1ft 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 commuter with a peak hour factor of 0.84, peak-hour volume of 2500 vehicles, and 4% recreational vehicles. What is the level of service?6.9 An eight-lane freeway (four lanes in each direction) is on rolling terrain and has 11-ft lanes with a 4-ft right-side shoulder. The total ramp density is 1.5 ramps per mile. The directional peak- hour traffic volume is 5400 vehicles with 11% heavy vehicles. The peak-hour factor is 0.95. It has been decided that heavy vehicles will be banned from the freeway during the peak hour. What will the freeway's density and LOS be before and after the ban? (Assume that the heavy vehicles are removed and all other traffic attributes are unchanged.)
- A basic segment of a rural freeway has the following characteristics: • Four-lanes (two lanes in each direction)%3B There is one ramp within 3 miles upstream, and 2 ramps within 3 miles downstream; 10-ft lanes; Right shoulder width of 4 ft; • Level terrain;. 10% trucks and 5% buses in the vehicle stream. Calculate the FFS at this freeway section and then determine the level of service (LOS) when the flow rate is 1740 pc/h/In. (Write the answer for the LOS in the box below).A 1/2-mile, 4 percent grade section of an urban freeway is to be designed for a LOS C. Determine the number of lanes (N) that are required in each direction, using the following design features. V = 2500 vph (weekday commuter traffic) PHF = 0.95 Traffic Composition: Trucks and buses =11 percent RVs = 2 percent Lane width = 12 ft. Lane obstruction = non fp = 1 Interchange spacing = 3 miles (no interchange within the section)A new section of a freeway is to be designed with a free-flow-speed of 65 mph along of 0.75 mile on 5% upgrade. The expected traffic volume is 4200 v/hr. The traffic composition is 15% trucks, 5% recreational vehicles, and 10% buses. The peak hourly factor is 0.9, the unfamiliar driver factor is 0.95. If the design requirement is to target a level of service (B), how many lanes must be provided to satisfy the design requirement?
- A 6-lane urban freeway is suggested to be designed with the following data: F.ADT = 45000 vpd, design hour factor= 0.12 and directional split = 65%. Rolling terrain, 10% trucks, 5% buses, 6% Rvs, PHF is 0.91 and all traffic are commuters. Then based on the HCM 2000 procedure, the equivalent passenger- car hourly flow rate is aboutC] An urban freeway in an area with rolling terrain has 8 lanes (4 in one direction). It has 12-ft lanes and 4 ft shoulder clearance. The peak hour volume in peak direction is 6000 vph, with 8% trucks, and a peak hour factor of 0.90. On average there is one diamond interchange every 2 miles. Determine the following for the peak direction under study: (a). Passenger-car equivalent flow rate (pcphpl); (b). Estimated free-flow speed for prevailing conditions; (c). Average passenger car speed; (d). LOS.A section of four lane (two lanes in each direction) freeway in mountainous terrain, which is 2.5 mi long, is to be improved to carry on a regular weekday a heavy volume of 3000 veh/h, consisting of 80% passenger cars, 15% trucks, 3% buses, and 2% recreational vehicles. The PHF is 0.90. Determine the additional number of 12-ft lanes required in each direction if the road is to operate at LOS B. The base FFS is 65mph, there is a lateral obstruction 4ft from the pavement on the right side of the road, and interchange spacing is 2 mi. Driver population adjustment factor fp= 1.0.