The 3 eastbound lanes of a rural freeway segment have 11 ft lane widths. There is a 3 ft lateral clearance on the right side of the road. There are no ramps within the influence area. What is the estimated FFS (mph)? Provide your answer to the nearest tenths.

The 3 eastbound lanes of a rural freeway segment have 11 ft lane widths. There is a 3 ft lateral clearance on the right side of the road. There are no ramps within the influence area. What is the estimated FFS (mph)? Provide your answer to the nearest tenths.

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter7: Intersection Design

Section: Chapter Questions

Problem 13P

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Concept explainers

Intersection Design

An intersection is a location where two or more roads or railways meet or join. The traffic movement is controlled at the intersection that depends on its design and type. It governs the operation, efficiency, speed, capacity, and safety of the highways, airways, and railways. The movement of the pedestrian causes hazards and delays at the intersection.

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The 2 southbound lanes of a four-lane (i.e. 2 lanes each direction) urban freeway are 12 ft wide. There is at least 6 ft of lateral clearance on the right side of the outer/right lane. There are two ramps within the influence area (i.e. within 3 miles upstream and 3 miles downstream of the center of the segment. What is the estimated FFS (mph)? Provide the answer to the nearest tenths.
The 4 northbound lanes of a rural freeway segment have 13 ft lane widths. There is no lateral clearance afforded on either side of the road. There are no ramps within the area of influence. What is the estimated FFS (mph)? Provide your answer to the nearest tenths.
QUESTION 1 A four-lane urban freeway segment has a peak demand volume of 3,500 vehicles per hour for the two eastbound lanes. The PHF is 0.95 and there are no trucks, buses or RVs because the freeway is classified as a parkway and such vehicles are prohibited. The segment has 12 ft lanes, no lateral obstructions, 3 ramps within the influence area, and meanders through some beautiful rolling terrain. Assuming the road will be used by commuters and those familiar with the road, what is the flow rate (pcphpl)? Provide your answer to the nearest integer.
QUESTION 8 The 3 eastbound lanes of a rural freeway segment have 11 ft lane widths. There is a 3 ft lateral clearance on the right side of the road. There are no ramps within the influence area. What is the estimated FFS (mph)? Provide your answer to the nearest tenths.
A four-lane freeway with 12 ft lanes and 5 shoulders is on a 2% grade for the 1.25-mi analysis stretch. There are 2 ramps in this section. If the traffic mix is generally 6% heavy vehicles with a 70/30 SUT/TT split and a PHF of 0.8, how many vehicles can the freeway carry in the peak hour without dropping below Level of Surface (LOS) C?
An eight-lane freeway section is designed to have a lane width of 12 ft, right-side shoulder width is 3 ft, and 3 ramps over a 2-mile-long centerline. What is the free-flow speed for this freeway section? a. 75 mph b. 70 mph 65 mph O d. 60 mph C.
A four-lane urban freeway segment has a peak demand volume of 3,500 vehicles per hour for the two eastbound lanes. The PHF is 0.95 and there are no trucks, buses or RVs because the freeway is classified as a parkway and such vehicles are prohibited. The segment has 12 ft lanes, no lateral obstructions, 3 ramps within the influence area, and meanders through some beautiful rolling terrain. Assuming the road will be used by commuters and those familiar with the road, what is the flow rate (pcphpl)? Provide your answer to the nearest integer.
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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?
During the peak hour on a Class Il two-lane highway in 5% grade terrain, volumes northbound are 1200 veh/h and volumes southbound are 400 veh/h. The PHF is 0.95, and there are 10% trucks/buses and 7% RVs. Lane widths are 12 ft, and shoulder widths are 4 ft. The roadway section is 5 mi in length, and there are 8 access points per mi. There are 50% no-passing zones and the base free-flow speed is 65 mi/h. Compute PTSF and ATS in both directions.
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