Improving Freight Trip Assignment by Modifying Toll Road Weight Applications

Yongseok Ko; Kim Sangrok; Cheong-Hyun Rho

doi:10.15793/kspr.2017.94..003

The reliability of traffic demand estimation has been consistently improved with focus on passenger travel. For freight travel, most researches have paid attention to modelling only. Though underestimation happens frequently in freight travel demand estimation, there is no method to include trip characteristics by vehicle type. In this situation, this study suggests to apply a toll road weight in the process of freight travel demand estimation. The toll road weight is used as a concept to reflect toll rate to an analysis model, but there is no standard for revision based on a vehicle’s trip characteristics. This study analyzed changes in freight travel demand according to the toll road weight. Four scenarios were set up for 7 highway lines according to the trip assignment method and the toll rate adoption method. The result shows that the extent of underestimation was somewhat relieved. And Scenario Ⅱ-1(using the toll road weight based on Passenger car unit) was considered to be most effective way to improve error rates for truck. Lastly, the study provides grounds for revision and guidelines to apply the toll road weight to freight travel.

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* 2021년 이후 발행 논문의 참고문헌은 현재 구축 중입니다.

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