An existing urban freeway in rolling terrain is to be analyzed to determine LOS using the following information: Number of lanes in each direction: 3 Peak hour volume: 3500 veh/h (in the peak direction, mainly commuter traffic) 8% trucks 0% recreational vehicles PHF=0.95 Lane width: 11 ft Lateral clearance: 4 ft Average interchange spacing: 1.0 mile Base FFS: 65 mph

An existing urban freeway in rolling terrain is to be analyzed to determine LOS using the following information: Number of lanes in each direction: 3 Peak hour volume: 3500 veh/h (in the peak direction, mainly commuter traffic) 8% trucks 0% recreational vehicles PHF=0.95 Lane width: 11 ft Lateral clearance: 4 ft Average interchange spacing: 1.0 mile Base FFS: 65 mph

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter9: Capacity And Level Of Service For Highway Segments

Section: Chapter Questions

Problem 4P

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An existing urban freeway in rolling terrain is to be analyzed to determine LOS using the following information: Number of lanes in each direction: 3 Peak hour volume: 3300 veh/h (in the peak direction, mainly commuter traffic) 8% trucks 2% recreational vehicles PHF=0.95 Lane width: 11 ft Lateral clearance: 4 ft Average interchange spacing: 1.0 mile Base FFS: 70 mph
An urban freeway is to be designed using the following information. AADT = 52,500 veh/day K (proportion of AADT occurring during the peak hour): 0.12 D (proportion of peak hour traffic traveling in the peak direction): 0.65 Trucks: 8% of peak hour volume PHF = 0.94 Lane width: 12 ft Shoulder width: 10 ft Total ramp density: 0.5 interchange/mile; all interchanges are to be cloverleaf interchanges Terrain: rolling Determine the number of lanes in the peak direction required to provide LOS C. (Assume commuter traffic and assume no RVs.)_______ lanes Show all calculations required. (Calculate your answers for the peak direction only. Enter fHV, the peak hour volume in veh/h, the free flow speed in mi/h, the demand flow rate in pc/h/ln, the mean speed in mi/h, and the density in pc/mi/ln.) fHV ________ peak hour volume___________veh/h free flow speed_______ mi/h demand flow rate___________ pc/h/ln mean speed_________ mi/h density_____________ pc/mi/ln.
A new basic freeway segment will have 3 lanes in each direction. The left and center lane each has a width of 12 ft while the width of the right lane is 13 ft. The left shoulder is 4 ft while the right shoulder is also 4 ft. There are 2 interchanges within 6 miles (3 miles upstream and 3 miles down stream).The site has level terrain, the design speed is 80 mph the hourly design volume is 5250 veh/h, which includes 9.0% trucks and buses. The peak hour factor is 0.870. Calculate FHV, VP, FFS, LOS Show all work
An urban freeway is to be designed using the following information. AADT = 51,500 veh/day K (proportion of AADT occurring during the peak hour): 0.11 D (proportion of peak hour traffic traveling in the peak direction):0.65 Trucks: 8% of peak hour volume PHF = 0.94 Lane width:12 ft Shoulder width:10 ft Total ramp density:0.5 interchange/mile; all interchanges are to be cloverleaf interchanges Terrain:rolling Determine the number of lanes in the peak direction required to provide LOS C. (Assume commuter traffic and assume no RVs.)_______ calculations required Calculate your answers for the peak direction only. Enter fHV, the peak hour volume _____veh/h the free flow speed _______ mi/h the demand flow rate i_______ pc/h/ln the mean speed ________mi/h the density ______ pc/mi/ln.)
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.
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 four-lane rural freeway segment has a 510 m grade length of 2% upgrade followed by a 630 m grade length of 3%. The freeway has 3.4-m lane, 1.5m left-shoulder lateral clearances and interchanges spaced at every 25 km. During the peak hour, there are 6% trucks, 2% buses, 2% recreational vehicles and the rest are passenger cars. Driver population adjustment is determined to be 0.90, peak hour factor is 0.90 and the BFFS is 110 km/h. At present, the freeway operates at capacity during the peak hour in the direction in question. If an additional 3.4 m lane is introduced, and all other factors stay the same, what will be the new level of service?
An existing rural freeway in rolling terrain is to be analyzed to determine LOS using the following information: Number of lanes in each direction: 2 Peak hour volume: 2640 veh/h 18% trucks 2% recreational vehicles PHF _ 0.91 Lane width: 12 ft Lateral clearance: 10 ft Average interchange spacing: 3 mi
A long segment of 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 vehicles per hour with 15% trucks (standard mix), how many lanes will be needed on the (A.) Upgrade, (B.) Downgrade, (C.) Level terrain segment to provide for level of service C? Lane widths and lateral clearances may be assumed to be 12 feet and 6 feet, respectively. Ramp density is expected to be 1.0 ramps per mile. The PHF is 0.92. Good weather, no incidents, no work zones, and regular users of the facility may be assumed.
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
Design a highway with the following criteria (Determine the minimum radius, widening and check if it needs transition spiral) Design speed = 85 kph I = 20o e = 0.06 sight distance = 125m m = 10 m 2 lane road Typical car wheel length 2.5 m Width of pavement per lane = 3.6 m PreviousNext
A 4-lane rural basic freeway segment is with hourly flow rate = 1528 pcphpl. The interchange density is 0.8/km, average lane width is 3.7m, sufficient lateral clearance. Using the HCM 2000 procedure, the estimated FFS speed (kph) and the current segment LOS are …………. and …………….. respectively. a. 108 & LOS D b. 107 & LOS E c. 114 & LOS C d. 104 & LOS B e. none