DEVELOPMENT OF VALUE FLOW CALIBRATION METHOD COMBINING TWO TRANSPORTATION CENSUS DATA

Abstract

One of the objectives of the "Roads System for Important Logistics Activities" established in 2018 is to improve logistics productivity, and traffic conditions for international maritime container vehicles are used as an indicator of "Importance". However, the value of the cargo being transported has not traditionally been quantified, and "Importance" has been verified exclusively by calibrated traffic volumes. This study develops a method for calibrating the value flow, which is the monetary value of each road link, by using the Commodity Flow Survey, the Road Traffic Census and the road network data for traffic assignment. Specifically, the value of cargo is estimated from the Commodity Flow Survey, and the B-zone OD table of the Road Traffic Census is used to allocate it proportionally. The estimated value are used to calculate the Value Flow each road link in the whole country (excluding Hokkaido and Okinawa prefectures) using the stochastic user equilibrium assignment model. The calibrated values were visualised on a map of Japan and were confirmed to be sensible, and the validity of this method would be reasonable. As a result, it is possible to provide a new perspective on the evaluation of road "Importance" by Value Flow.