Road Projects



Concept of Project Evaluation

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.

Work Flow in Road Project Evaluations

A project is rigorously evaluated at each phase.

Cost-Benefit Analysis

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


2.Effectiveness of road network maintenance

Case 1: Improvement of logistics functions through the opening of the Doto Expressway

-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

Case 2: Boost in regional activity due to extension of the Trans-Shikoku Highway

-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