Example Existing AADT-10,000, Traffic (AADT) increases 200 per year Cost of a new road $72,000,000 If not build a new road, need rehabilitation of $5,000,000 in 10 years O Annual saving in O&M cost from building the new road and relinquishing the old road: $4,100,000 Gas saving $2.0 per trip. 20 years life, 5% discount rate 109 o What are the NPB, BCR and EUAC