Briefly describe the traffic characteristics associated with each of the levels of service for basic freeway sections.
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A: As per guidelines we need to answer only first question so please repost rest questions separately.
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Q: Q3. A new section of a freeway is to be designed with a free-flow-speed of 65 mph along of 0.75 mile…
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A: Solution Given Data Speed = 65 mph 0.75 mile on 5% upgrade Traffic volume= 4200 v/hr Taffic…
Q: is to be designed to provide LOS C for the following conditions: design hourly volume of 5600 veh/h;…
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Q: A six-lane freeway (three lanes in each direction) in a scenic area has a measured free-flow speed…
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Q: ane freeway (three lanes in each direction) in a scenic area has a measured free-flow speed of 55…
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Q: A six-lane freeway (three lanes in each direction) has regular weekday users and currently operates…
A: Consider the given data Width of road=3.3 m =10.83 ft≈11ftRight…
Briefly describe the traffic characteristics associated with each of the levels of service for basic freeway sections.
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- Describe the factors that affect the level of service of a freeway section and the impact each has on flow.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.A rural collector highway is to be constructed in an area of rolling terrain where the ADT is 950 veh/day. For this situation, determine the following design values: a. Minimum design speed b. Desirable lane width and shoulder width c. Maximum desirable grade
- 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 mphA 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%; free flow speed: 70 mi/h; no lateral obstructions;rolling terrain; total ramp density of 0.75 ramps per mile.Determine: whether eight (four in each direction) 12 ft lanesare enough to provide LOS C.A 5% upgrade on a six-lane freeway (three lanes in each direction) is 1.25 mi long. On this segment of freeway, the directional peak-hour volume is 3800 vehicles with 2% large trucks and 4% buses (no recreational vehicles), the peak- hour factor is 0.90, and all drivers are regular users. The lanes are 12 ft wide, there are no lateral obstructions within 10 ft of the roadway, and the total ramp density is 1.0 ramps per mile. A bus strike will eliminate all bus traffic, but it is estimated that for each bus removed from the roadway, seven additional passenger cars will be added as travelers seek other means of travel. a.) What is density, before the bus strike? b.) What is the volume-to-capacity ratio, before the bus strike? c.) What is the level of service of the upgrade segment before the bus strike? d.) What is density, after the bus strike? e.) What is the volume-to-capacity ratio, after the bus strike? f.) What is the level of service of the upgrade segment after the bus strike?
- 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.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.)2- Explain the design philosophy for a Diverging Diamond Interchange (DDI) and show the traffic flow on a schematic of the interchange. Compare the advantages and disadvantages with the regular diamond interchange. Also, explain the design criteria that should be considered for a DDI.
- which type of urban road would have free-flow traffic characteristics? 1. Arterial 2. Local 3. Freeway 4. CollectorAn 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.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): D (proportion of peak hour traffic traveling in the peak direction): Trucks: PHF = 0.94 Lane width: Shoulder width: Total ramp density: Terrain: 3 Determine the number of lanes in the peak direction required to provide LOS C. (Assume commuter traffic and assume no RVs.) lanes. 0.12 0.65 8% of peak hour volume demand flow rate 12 ft 10 ft 0.5 interchange/mile; all interchanges are to be cloverleaf interchanges rolling HV' Show all calculations required. (Calculate your answers for the peak direction only. Enter fy, the peak hour volume in veh/h, the free flow speed in mi/h, the demand flow rate in pc/h/In, the mean speed in mi/h, and the density in pc/mi/ln.) fHV peak hour volume 0.893 free flow speed mean speed density 6300 X Your response differs from the correct answer by more than 10%. Double check your calculations. veh/h 1500 X Your…