Determine if a segment of 700 feet is safe for vehicles to decide to maneuver on a two-lane rural highway of 80 mph speed.
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- Determine if a segment of 700 feet is safe for vehicles to decide to maneuver on a two-lane rural highway of 80 mph
speed.
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- A six-lane freeway (three lanes in each direction) in rolling terrain has 10-ft lanes and obstructions (fLw = 6.0 mph) 4 ft from the right edge of the traveled pavement (fic = 0.8 mph). There are five ramps within three miles upstream of the segment midpoint and four ramps within three miles downstream of the segment midpoint. A directional peak-hour volume of 2000 vehicles (primarily commuters) is observed, with 600 vehicles arriving in the highest 15-min flow rate period. The traffic stream contains 12% large trucks (ET = 2.5) and buses and 6% recreational vehicles (ER = 2.0). 1.) What is the estimated free-flow speed of the traffic stream in mph (whole number, nearest 5)? 2.) What is the peak-hour factor 3.) What is the heavy-vehicle adjustment factor? 4.) What is the service flow rate? 5.) What is the service measure value if the average speed of the traffic stream is 65 mphQ2/ A 3200 ft segment of 3.25-mi 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 11 ft. The measured free-flow speed is 46.0 mi/h. The peak-hour volume is 1900 veh/h, PHF is 0.90, and there are 13% trucks and 2% RVs. Determine the LO, speed, and density.A six-lane freeway (three lanes in each direction) in rolling terrain has 10-ft lanes and obstructions (fLW = 6.0 mph) 4 ft from the right edge of the traveled pavement (fLC = 0.8 mph). There are five ramps within three miles upstream of the segment midpoint and four ramps within three miles downstream of the segment midpoint. A directional peak-hour volume of 2000 vehicles (primarily commuters) is observed, with 600 vehicles arriving in the highest 15-min flow rate period. The traffic stream contains 12% large trucks (ET = 2.5) and buses and 6% recreational vehicles (ER = 2.0). What is the estimated free-flow speed of the traffic stream in mph (whole number, nearest 5)? What is the peak-hour factor (3 decimal places)? What is the heavy-vehicle adjustment factor (2 decimal places)? What is the service flow rate (whole number, nearest 5)? What is the service measure value if the average speed of the traffic stream is 65 mph (one decimal place)?
- A six-lane freeway (three lanes in each direction) in rolling terrain has 10-ft lanes and obstructions (fLW = 6.0 mph) 4 ft from the right edge of the traveled pavement (fLC = 0.8 mph). There are five ramps within three miles upstream of the segment midpoint and four ramps within three miles downstream of the segment midpoint. A directional peak-hour volume of 2000 vehicles (primarily commuters) is observed, with 600 vehicles arriving in the highest 15-min flow rate period. The traffic stream contains 12% large trucks (ET = 2.5) and buses and 6% recreational vehicles (ER = 2.0). What is the peak-hour factor (3 decimal places)A four-lane freeway (two lanes in each direction) is located on rolling terrain and has 12-ft lanes, no lateral obstructions within 6 ft of the pavement edges, and there area two ramps within three miles upstream of the segment midpoint and three ramps within three miles downstream of the segment midpoint. The traffic stream consists of cars, buses, and large trucks (no recreational vehicles). A weekday directional peak-hour volume of 1800 vehicles (familiar users) is observed, with 700 arriving in the most congested 15-min period. If a level of service no worse than C is desired, determine the maximum number of large trucks and buses that can be present in the peak-hour traffic stream.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.
- A two-lane minor road intersects a two-lane undivided major road at 90 degrees, forming a four-leg intersection with traffic on the minor road controlled by a yield sign. A building is located 50 m from the center line of the outside lane of the major road and 14 m from the center line of the nearest lane of the minor road. A passenger car on the minor road would like to cross the major road. Using the AASHTO procedure, determine the maximum speed that can be allowed on the minor road if the design speed on the major road is 80 km/h. Assume a 3% approach grade for the minor road. Note: 1km/hr = 0.62mi/h, 1ft = 0.3048mA four-lane freeway (two lanes in each direction) is located on rolling terrain and has 12-ft lanes, no lateral obstructions within 6 ft of the pavement edges, and there are two ramps within three miles upstream of the segment midpoint and three ramps within three miles downstream of the segment midpoint. The traffic stream consists of cars, buses, and large trucks (no recreational vehicles). A weekday directional peak-hour volume of 1800 vehicles (familiar users) is observed, with 700 arriving in the most congested 15-min period. If a level of service no worse than C is desired, b.) Determine the adjustment factor (Express in three decimals)A four-lane freeway (two lanes in each direction) is located on rolling terrain and has 12-ft lanes, no lateral obstructions within 6 ft of the pavement edges, and there are two ramps within three miles upstream of the segment midpoint and three ramps within three miles downstream of the segment midpoint. The traffic stream consists of cars, buses, and large trucks (no recreational vehicles). A weekday directional peak-hour volume of 1800 vehicles (familiar users) is observed, with 700 arriving in the most congested 15-min period. If a level of service no worse than C is desired, determine the maximum number of large trucks and buses that can be prersent in the peak hour traffic stream
- A four-lane freeway (two lanes in each direction) is located on rolling terrain and has 12-ft lanes, no lateral obstructions within 6 ft of the pavement edges, and there are two ramps within three miles upstream of the segment midpoint and three ramps within three miles downstream of the segment midpoint. The traffic stream consists of cars, buses, and large trucks (no recreational vehicles). A weekday directional peak-hour volume of 1800 vehicles (familiar users) is observed, with 700 arriving in the most congested 15-min period. If a level of service no worse than C is desired, c.) Determine the maximum number of large trucks and buses that can be present in the peak-hour Traffic stream. (Round off to nearest integer)A 3.25-mile segment of undivided, four-lane highway is primarily on level terrain. The highway segment does, however, contain one sustained grade of 2.5% that is 3,200 ft long. Other relevant information include: Base free-flow speed = 65 mph %3! 11-ft lanes • 4 ft clearance at the roadside (right side) • 20 access points/mile Peak-hour volume = 1,900 veh/h 13% trucks; 2% RVs • PHF = 0.90 • Familiar facility users At what LOS is the highway expected to operate? (Hint: Three different analyses will be needed: a) the level terrain portion of the highway, b) the 2.5% upgrade portion of the highway, and c) the 2.5% downgrade portion of the highway.)A four-lane freeway (two lanes in each direction) is located on rolling terrain and has 12-ft lanes, no lateral obstructions within 6 ft of the pavement edges, and there are two ramps within three miles upstream of the segment midpoint and three ramps within three miles downstream of the segment midpoint. The traffic stream consists of cars, buses, and large trucks (no recreational vehicles). A weekday directional peak-hour volume of 1800 vehicles (familiar users) is observed, with 700 arriving in the most congested 15-min period. If a level of service no worse than C is desired, a.) Determine the Freeflow Speed
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