A long segment of the suburban freeway is to be designed on level terrain. The level...

A long segment of the suburban freeway is to be designed on level terrain. The level segment, however, is followed by a 4.5% grade, 2.0 miles in length. If the DDHV is 2,500 veh/h with 15% trucks (standard mix), how many lanes will be needed on the (a) upgrade, (b) downgrade, (c) level terrain segment to provide for the level of service C? Lane widths and lateral clearances may be assumed to be 12 ft and 6 ft, respectively. Ramp density is expected to be 1.0 ramps/mi. The PHF is 0.92. Good weather, no incidents, no work zones, and regular users of the facility may be assumed.

Expert Solution

Ally Wells answered 1 year ago

Given: - Level terrain - extended freeway segment - Urban area with 0.9 interchanges/km - DDHV...

Given: - Level terrain - extended freeway segment - Urban area with 0.9 interchanges/km - DDHV 4050 vehicles/hour - 10% trucks, no buses, no RVs - PHF 0.95 - Full shoulder and 3.6m wide lanes Determine: - Number of lanes to operate at LOS=C

A freeway is being designed for a location in mountainous terrain. The expected free-flow speed is...

A freeway is being designed for a location in mountainous terrain. The expected free-flow speed is 88.5 km/h. Lane widths will be 3.6 m and shoulder widths will be 1.8 m. During the peak hour, it is expected there will be a directional peak- hour volume of 2700 vehicles, 12% large tracks and buses and 6% recreational vehicles. The PHF and driver population adjustment are expected to be 0.88 and 0.90, respectively. If a level of service no worse than...

9) An existing rural freeway in level terrain is to be analyzed to determine LOS using...

9) An existing rural freeway in level terrain is to be analyzed to determine LOS using the following information: number of lanes in each direction equals 2, peak hour volume of 2140 veh/h (in the peak direction), 15% trucks, 2% recreational vehicles, PHF = 0.90, lane width = 12 ft, lateral clearance = 10 ft, average interchange spacing is 3 mi.

A six-lane freeway with three lanes in each direction is on a level terrain and has...

A six-lane freeway with three lanes in each direction is on a level terrain and has 11-ft lanes with a 4-ft right-side shoulder. The total ramp density is 2 ramps per mile. The directional peak-hour traffic volume is 5400 vehicles with a peak-hour factor of 0.95 and all familiar users. The traffic stream includes 5% trucks and another 5% buses and no recreational vehicles. The city has decided to ban all heavy vehicles from using the freeway during the peak...

A new suburban freeway is being designed. Estimated AADT is 40,000 veh/day, 60% of the peak...

A new suburban freeway is being designed. Estimated AADT is 40,000 veh/day, 60% of the peak flow traffic travels in the peak direction, the PHF is 0.85, and the terrain is rolling. There will be 3 ramps per mile, and traffic is expected to include 18% heavy vehicles (50% SUTs and 50% TTs). Lanes will be 12 feet wide with a lateral clearance of 6 feet. One segment of the road of the road has a 0.75-mile-long section with a...

6-lane freeway (3 lanes in each direction) in level terrain has a current one-directional volume of...

6-lane freeway (3 lanes in each direction) in level terrain has a current one-directional volume of 5000 veh/h; it is estimated that in 3 years, volume will have increased to 5600 veh/h. The traffic mix includes 10% trucks. The free-flow speed has been measured at 70 mph and the PHF is 0.95. a) Determine the current LOS. b) Determine the LOS in 3 years. c) After the initial three years, traffic grows at 4% per year, when will capacity be...

A six lane urban freeway (three lanes in each direction) in mountainous terrain has 10-ft lanes...

A six lane urban freeway (three lanes in each direction) in mountainous terrain has 10-ft lanes and obstructions 5 ft from the right edge. For every mile of freeway, there is one interchange. 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 LOS? Assume base free flow speed of 70 mph

Problem Statement: A four-lane (two-lanes in each direction) freeway is on rolling terrain with 11-ft lanes, a...

Problem Statement: A four-lane (two-lanes in each direction) freeway is on rolling terrain with 11-ft lanes, a 5-ft lateral clearance on right side and 3-ft lateral clearance on the left side of the traveled pavement. The measured free-flow speed is 60-mph. During the peak hour there are 12% large trucks and buses and 6% recreational vehicles. The freeway currently operates at capacity during the evening peak hour. If an additional 11-ft lane is added, and all other factors stay the same,...

A four-lane urban freeway is rolling on rolling terrain with 12-ft lanes, obstructions 2-ft from the...

A four-lane urban freeway is rolling on rolling terrain with 12-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 2400 vehicles is observed with 800 vehicles arriving in the most congested 15-min period. If the traffic stream has 10% large trucks and buses and recreational vehicles,...

A freeway is to be designed to provide LOS C for the following conditions: design hourly...

A freeway is to be designed to provide LOS C for the following conditions: design hourly volume of 5600 veh/h; PHF: 0.92; trucks: 6%; recreational vehicles: 0%; driver population: commuters and familiar drivers; right side lateral clearance: 7ft; rolling terrain; total ramp density of 0.75 ramps per mile. Determine: whether eight (four in each direction) 12 ft lanes are enough to provide LOS C.

Question