Road Improvement Proposal With Benefit To Cost Ratio Calculation

There are two Alternative proposals to improve traffic flow in Downtown Bangalore, India. Costs and monetary equivalents of benefits and dis‐benefits are listed in the Table below. The planning period is n years. Salvage values are zero. The interest rate is X%.


Alternative #1

Alternative #2

Initial road construction cost



Road maintenance cost/year



Improved traffic flow/year



Reduced noise pollution/year


$ 0

Improved road safety/year



Reduced traffic policing cost/year  


$ 0

Increased air pollution/year



Reduced car idling time/year


$ 0

(a) the benefit cost ratio for Alternative 2, if n = 30 and x = 3
(b) the minimum value of n that would make Proposal acceptable if x = 2%
(c) the preferred Alternative, if n = 28 and x=3%


The question belongs to Civil Engineering and it discusses about proposals for reducing traffic in Bangalore city. The cost and monetary benefits have been given. The benefit to cost ratio for the two proposals, the minimum value for the proposals as well as the preferred alternative have been calculated in the solution.

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