Setting a procedure to assess the efficiency in provision of the funds and operational expenses in road safety projects requires to establish a process involving the economic appraisal and optimization tasks. In the optimization process developed in the paper, five types of geometric features may be considered in the analysis including: (1) lane width and pavement condition, (2) horizontal curves, (3) vertical curves, (4) roadside condition, and (5) narrow bridges. The model enables the users to evaluate a variety of improvement alternatives for each predetermined geometric feature along the rout under study, following which all possible mutually exclusive proposals are avhieved for each site. Both calculating the executive costs and estimating the monetary benefits according to the reduction of road accidents for each proposal are the main components in estimating the net benefit attributable to each mutually exclusive proposal. Afterwards, an optimization process using linear integer programming is fed by the outpts of the cost-benefit analysis to find out the highest net benefit (as an efficiency criteria) among all provided proposals for all sites under study.