Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Chapter 13, Problem 11P
To determine
The expected traffic volume in year 2022.
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Consideration is being given to increasing the toll on a bridge now carrying
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the volume equation for veh/day is V= 4500 - 400 (x/25), and the new
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Question:-
Traffic counts in the year 2000 at a counting point on a national highway gave ADT as follows: 4000cars,1750 taxis,250 trucks,100 buses.National traffic growth in the area is expected to be 5% for private cars and taxis, 3% for trucks and buses.After improvements, generated traffic for the highway will be 20 % of the 2000 ADT.It is required to design the cross-section of the highway to satisfy the traffic needs by the year 2015 show all visible dimensions on a drawing sketch.
Take:-K= 0.15PLC = 800 p.c.e'/hour.directional distribution (D) is 0.6
a vehicle purchased for 43,000 at a constant rate of 25% how many years it takes for the vehicle value to reach 17,000
Chapter 13 Solutions
Traffic and Highway Engineering
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- A secondary road in a developing country, 30 miles long, is to be improved by surface treating the gravel surface without any change in length. The cost of the improvement is estimated at $150,000 per mile. A present annual transport cost for all traffic on the existing road (vehicle operating cost, maintenance cost, etc.) is estimated at $205,000 per mile. After improvement, this is expected to reduce to $170,000 per mile per annum. Reconstruction takes place in two years with equal expenditures in each year. Assume that in the second year of construction, transport cost on the improved road is equivalent to present costs in half the length and new transport cost on the other half. Would you undertake the project? (The minimum attractive rate of return (MARR) is 8.5% and the project life is 20 years after reconstruction.) Resealing would be required 10 years after reconstruction at a cost of $55,000 per mile. Use the net present worth methodarrow_forwardAverage demand on a rural roadway ranges from zero to 600 veh/day when the cost per trip goes from $1.75 to zero. (a) Calculate the net user benefits per year (in dollars) if the cost decreases from $1.50 to $0.75/trip (assume a linear demand function). $ 29 x Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results roundoff error. (b) Compare the value calculated in (a) with the benefits as calculated in typical highway studies. (Enter the benefits in dollars as calculated in typical highway studies.) $ 88000 x Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results E roundoff error.arrow_forwardA toll bridge carries 10,000 veh/day. The current toll is $3.00/vehicle. Studies have shown that for each increase in toll of 50 cents, the traffic volume will decrease by 1000 veh/day. It is desired to increase the toll to a point where revenue will be maximized. Let V be the Volume X be the increase in toll charge (a) Write the expression for travel demand on the bridge related to toll increase and current volume. (b) Determine the increase in toll charge (c) Determine the new toll charge to maximize revenues. (d) Determine traffic in veh/day after toll increase. (e) Determine total revenue increase with new toll.arrow_forward
- Consider a simple transportation network that has one origin and one destination with two paths/links that provide access from the origin to the destination. One link is 9 miles long and has a capacity of 4800 vehicles per hour and a speed limit of 66 miles per hour. The other link is 6 miles long and has a capacity of 2400 vehicles per hour and a speed limit of 42 miles per hour. Assuming that 6000 drivers wish to make the trip from the origin to the destination, find the loaded network? a1 = 1.37904, b1 = 8.24124, a2 = 1.236, b2 = 6.2712arrow_forwardSuppose that the projected road vehicle traffic flow in a corridor is 5000 vehicle-trips per hour in one direction. The average perceived user cost functions of the two major highways (Route 1 and Route 2 in the corridor are as follows (in dollars): Route 1: Ci =1 +8(qı/5000) Route 2: C2 = 1+10(q2/2500) Where: qi and q2 are the traffic flows on Route 1 and Route 2 respectively. Calculate the volume of traffic during the peak hour on each route, if users were free to choose their own routes.arrow_forwardCivil engineeringarrow_forward
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- help plsarrow_forwardIt is known that 5,000 automobile trips are generated in a large residential area from 3:00 PM to 4:00 PM on Sundays for shopping purposes. If a logit model is estimated with coefficients of 0.0165 for commercial space (in thousands of ft²) and -0.5435 for distance (in miles), how many trips will be made to each of the 3 shopping centers with characteristics shown in the table below? Shopping Center 1 2 3 Distance from Commercial residential area (miles) floor space (ft²) 2.43 200,000 4.67 5.02 150,000 300,000arrow_forwardAnswer b.arrow_forward
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