Policy Analysis and Evaluation (CostEffectiveness analysis)

Suppose that we compare two possible highway projects designed to reduce the number of traffic accidents. Project A costs $2400 in present value during a ten-year period, and Project B costs $3000 in present value during a five-year period. The benefit of the projects is the number of traffic accidents reduced. Suppose that Project A can reduce the accidents by 100 counts every year and Project B by 200 counts every year. Which project is more cost-effective in the first year?