e Highway in 1995 is 10.000
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- A toll bridge carries 6000 vch/day The current toll is $3.50/vehicle. Studies have shown hat for each increase in toll of 50 cents, the traffic volume will decrease by 500 veh/day. Jus desired to increase the toll to a point where revenue will be maximized. (a) Write the expression for travel demand on the bridge, related to toll increase and current volume. (b) Determine the toll charge to maximize revenbes. (o Determine traffic in vel/day after the loll increase, (d) Determine the total revente increase with the new tol.A bridge has been constructed between the mainland and an island. The total cost (excluding tolls) to travel across the bridge is expressed as C- 50 + 0.5V, where V is the number of veh/hr and Cis the cost/vehicle in cents. The demand for travel across the bridge is V- 2500 - 10C. (a) Determine the volume of traffic across the bridge. (b) If a toll of 25 cents is added, what is the volume across the bridge? What volume would be expected with a 50 cent increase? 155 (c) A tollbooth is to be added, thus reducing the travel time to cross the bridge. The new cost function is C- 50 + 0.2V. Determine the volume of traffic that would cross the bridge. (d) Determine the toll to yield the highest revenue for demand and supply function in part (a), and the associated demand and revenue(show your solutions) Compute for the Total Remaining Traffic * A.15,858 vehicles B.15,743 vehicles C.15,862 vehicles D.15,750 vehicles E.None of the above
- Three routes connect an origin-destination pair with performance functions:t₁ = 20 +0.5x1t2 = 4+ 2x2t3=3+0.2x3with t in minutes and x in thousand vehicles per hour.(a) Determine the User Equilibrium flow on each route if q = 4000veh/h. (b) What is the minimum q (origin-destination demand) to ensure that all the three routes are used under user equilibrium? (c) Suppose that Route 1 is closed for repair. Find the system optimal flow on routes 2 and 3 and compute the total travel times.а. The Department of Traffic is considering three improvement plans for a heavily traveled road within the city. The road improvement is expected to achieve three goals: improve travel speeds, increase safety, and reduce operating expenses for motorists. The annual dollar value of savings compared with existing conditions for each criterion and additional construction and maintenance costs is shown in Table 1. If the economic life of the road is considered to be. Table 1: Cost and Benefits for Improvement Plans concerning Existing Conditions Alternative Construction Annual Annual Annual Annual Cost ($) Saving Cost Travel Time Operation Maintenance in Benefits($) Saving($) Cost($) Accidents($) 185.000 5000 3000 300 1500 220,000 5000 6500 500 2500 II 310,000 7000 6000 2800 3000If current ADTS of a highway is 24,000 and rate of annual growth in traffic is 3% for 18 years design life and 2years of construction,Traffic projection factor will be equal to 3 5 O
- 3. Three routes connect an origin-destination pair with performance functions: ti=20 +0.51 t₂ = 4+2x2 tε = 3 +0.2x² with t in minutes and r in thousand vehicles per hour. (a) Determine the User Equilibrium flow on each route if q = 4000veh/h. (b) What is the minimum q (origin-destination demand) to ensure that all the three routes are used under user equilibrium? (c) Suppose that Route 1 is closed for repair. Find the system optimal flow on routes 2 and 3 and compute the total travel times.Q2 / Find the number of lane for the design roadway given the following traffic data: ADT = 7651 vehicles/hour in both direction, - 2% grade , K = 12% , D= 55% , Truck 30%, Busses = 10% , Normal growth for design period = 30% , Generated growth = 20%, Development traffic = 250% , Track = 2 PCU , Busses = 3 PCU and Ideal Сараcity = 1300 PCU / hour / lane.Consider the following project network. Determine the critical path and the project duration. E H Start Finish 8. B4 A2
- H.W. For a two-way highway with information shown below determine future ADT and DHV. a design 20 years & construction on period of years, current ADT is 5500 vpd, annual growth rate of traffic is 4.5% per year.The daily counts of the current traffic volume for a rural highway for one week of May 2000 are as shown in the following table: Sat. Sun. Mon. Tues. Wed. Thur. Fri. Day Daily volume 12000 12500 10500 11500 9500 9000 8500 The traffic is composed of 70% passenger car, 20% bus, 10% truck. The percent of future traffic to current traffic is predicted to be 180% up to May 2020. Determine the required number of lanes for this highway if the lane capacity is 1300 pc/hr.Determine the number of lanes required to provide LOS B (v/c 0.21 – 0.50). 30,000 pcu/day PHF = 7% : 20,000 pcu/day Basic Capacities for highways and urban streets Basic hourly Road Carriageway capacity in pcu in both direction type width, m Highway S4.0 600 4.1- 5.0 1,200 5.1 - 5.5 1,800 5.6 - 6.1 1,900 6.2 - 6.5 2,000 6.6 - 7.3 2,400 7,200 (expressway) 2x 7.0 Urban ~ 6.0 1,200 Street 6.1 - 6.5 1,600 6.6 – 7.3 1,800 2 x 7.0 6,700 Basic Capacities for Multilane Highways No. of lanes per 2 3 direction Hourly capacity, pcu/lane 1,800 1,750 1,700