A rural arterial is to be constructed in an area of rolling terrain, determine the following design values: (a) Minimum design speed; (b) Recommended lane width; (c) Preferable shoulder width; (d) Maximum grade;
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A rural arterial is to be constructed in an area of rolling terrain, determine the
following design values:
(a) Minimum design speed;
(b) Recommended lane width;
(c) Preferable shoulder width;
(d) Maximum grade;
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- 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 gradean urban freeway in rolling terrain is designed to carry a design volume of 800 veh/day. Determine the following: (a) a suitable design speed, (b) lane and usable shoulder widths, (c) maximum desirable grade.True or False: Directional and lane distribution factors need to be considered to obtain initial traffic on the design lane.
- 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 located in a mountainous terrain is designed to carry a design volume of 800 veh/day. Determine the following: (a) a suitable design speed, (b) lane and usable shoulder widths, (c) maximum desirable grade. Repeat Problem 1 for an urban freeway in rolling terrain.Find the maximum allowable grade and critical length of grade for each of the following facilities: a. A rural freeway in mountainous terrain with a design speed of 60 mi/h.b. A rural arterial in rolling terrain with a design speed of 45 mi/h. c. An urban arterial in level terrain with a design speed of 40 mi/h.
- A divided hwy is to be built in a suburban level terrain, forecasted AADT = 12,000 vehicle/day, with 5% trucks, the fraction of traffic in the peak direction of flow is 0.7, PHF = 0.85, desired LOS is "C", assume K factor = 0.12, the number of lanes that will be needed in each direction is: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.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.)
- which type of urban road would have free-flow traffic characteristics? 1. Arterial 2. Local 3. Freeway 4. CollectorAn 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 eight-lane freeway (four lanes in each direction) is on rolling terrain and has 11-ft lanes with a 4- ft right-side shoulder. The total ramp density is 1.5 ramps per mile. The directional peak-hour traffic volume is 5400 vehicles with 11% heavy vehicles. The peak 15-minute volume is 1421 vehicles. What are the freeway’s density and level of service