A six-lane freeway has 11-ft lanes with 5-ft shoulders on the right side. There are 5 interchanges every ten miles. Estimate the free flow speed.
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- A segment of rural freeway is being designed for a FFS of 65 mph using 11 ft lanes in a mountainous area. The lateral clearance is nominal (1 ft). The directional (i.e. one-way) design flow rate is expected to be 2,400 passenger cars per hour. How many lanes in one direction will be needed to provide at least a LOS B?A four-lane undivided highway (two lanes in each direction) has (3.4m) lanes, with (1.2 m) shoulders on the right side. There are 4.5 access points per km, and the posted speed limit is 80 km/h. What is the estimated free-flow speed?An eight-lane freeway section is designed to have a lane width of 10 ft, right-side shoulder width is 4 ft, and 5 ramps over a 2-mile-long centerline. What is the free-flow speed for this freeway section? a. 75 mph b. 70 mph c. 65 mph d. 60 mph
- Given: 4-lane urban freeway; Interchange density 1.5/mile; Directional peak flow = 1950 veh/hr; 5% trucks; PHF = 0.90; 11 ft lanes; obstructions 4ft from right edge; Rolling terrain.Determine (a) LOS, and; (b) how much additional traffic could be accommodated before reaching capacity?A freeway is to be designed for the following conditions:Heavy vehicle adjustment factor = 0.80Total ramp density =0.75 ramps/miTwo lanes each way with average lane width = 12 ftRight side lateral clearance = 4 ftNo. of lanes in one-way = 2 What is the free flow speed (FFS) in mph of the basic freeway segmen?A multi-lane Minor Arterial is being designed through a level urban area. The current daily volume = 8000 vpd in both directions with 10% Trucks, peak hourly factor 90%and a 60% directional distribution factor. How many lanes are required?
- Find the upgrade and downgrade service flow rates and service volumes for an eight lane freeway with the following characteristics: (11 ft lanes, 2 ft right-side clearance, 4.2 ramps/mile, 3% trucks, good weather, regular drivers, PHF of 0.92) The segment in question is on a sustained grade of 3.5%, 1.5 miles in length.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 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.
- Determine the LOS on a regular weekday on a 1.5-mile segment of an 8-lane freeway (four lanes in each direction) in rolling terrain. Use the following data.A segment of rural freeway is being designed for a FFS of 70 mph through rolling terrain. The directional (i.e. one-way) design volume is 3,000 vehicles per hour. If 10% of the design volume is expected to be heavy vehicles (i.e. trucks and buses), what is the heavy vehicle adjustment used to determine the flow rate? Provide you answer to the nearest hundredths.Traffic volume is 2578 veh/hr with 687 vehicles arriving in peak 15 minutes.There are tow lanes, 12 percent trucks(30/70 split for SUT/TT), the length of the road is 1.8 miles long with a 3.5 percent grade. calculate the analysis flow rate?