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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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
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
method
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Traffic and Highway Engineering
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