Current cost-benefit analysis based on the 3 benefits does not cover all effects created by road development. This means we need to appropriately assess a wide variety of effects other than the 3 benefits.

Other cost-benefit analysis methods used in other countries include monetary-value-based B/C analysis and qualitative/quantitative B/C analysis in an integral manner.

The former method has issues of double counting and accuracy, while the latter has issue of who should make a decision (i.e. governance of evaluation) and needs to involve representatives who are democratically-elected by the general public.

More discussion is necessary while trying out different methods in variety of projects in the future.

A project is rigorously evaluated at each phase.

1) Cost-Benefit (B/C Ratio) Calculation

2) Benefits from Travel Time Savings

3) Benefits from Operating Cost Savings

4) Benefits from Accident Cost Savings

-As the Doto Expressway has been progressively opened, the region accessible in 4 hours has expanded
-With expansion of the network, logistics-related companies are increasingly locating in the Obihiro metropolitan area

Region accessible from Sapporo within 4 hours before and after the opening of the Doto Expressway

Location situation of logistics companies, etc. across the Obihiro urban area

Change in required travel time between Sapporo and Obihiro

-Following construction of the Trans-Shikoku Highway, improved access to Uwajima Port resulted in increased numbers of cruise ships and overseas tourists
-In the future, further expansion of inbound tourism is expected resulting from extension of the Tran

Changes in the numbers of port calls at Uwajima Port and overseas tourists