Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Chapter 13, Problem 10P
To determine
(a)
The present worth of costs for this project
To determine
(b)
The converted value obtained above to equivalent uniform annual cost.
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C) Two alternatives have been proposed to construct a new road project to improve capacity and
safety. The table below explains each alternative's costs: the initial construction costs, annual
operating and maintenance costs after the first year, and resurface of road costs. Assume that the
annual interest rate is 5%. Determine the present worth for each alternative, then choose the
preferred alternative based on the economic criteria. by present worth
Alternative
The initial construction costs
The annual operating and maintenance costs
The resurface costs
Service life (years)
$4.000.000
$3.900
$850,000
(Every five years)
14
$3,800,000
$4,100
$800.000
(Every four years)
Two alternatives are under consideration for maintenance of a bridge. Select the mostcost-effective alternative using present worth analysis. Assume an interest rate of10% per year and a design life of 50 years for each alternative.Alternative A consists of annual maintenance costs of $5,000 per year for the designlife except for:Year 20, in which bridge deck repairs will cost $20,000Year 30, in which a deck overlay and structural repairs will cost $105,000Alternative B consists of annual maintenance costs of $3,000 per year for the designlife except for:Year 20, in which bridge deck repairs will cost $35,000Year 30, in which a deck overlay and structural repairs will cost $85,000
Dunkin City wants to build a new bypass between two major roads that will cut travel time for
commuters. The road will cost $14,000,000 and save 17,500 people $100/yr in gas. The road will
need to be resurfaced every year at a cost of $7,500. The road is expected to be used for 20 years.
Determine if Dunkin City should build the road using B/C analysis. The cost of money is 8%.
Chapter 13 Solutions
Traffic and Highway Engineering
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