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Item Data Accidents per 100 000 000 vehicle-kilometers in 6 m lanes 150 Accidents per 100 000 000 vehicle-kilometers in 7.5 m lanes 90 Serious

Item Data
Accidents per 100 000 000 vehicle-kilometers in 6 m lanes 150
Accidents per 100 000 000 vehicle-kilometers in 7.5 m lanes 90
Serious personal injuries per accident 10%
Average non-human cost per accident ($) 2500
Average cost of personal injuries per accident ($) 40 000
Annual road use (vehicles) 7 500 000
First cost per kilometer ($) 175 000
Operating and maintenance costs per kilometer/year ($) 7500
Project life (years)

25

MARR = 10%

Find the present worth of costs of lane-widening

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