01555119

Component

Approval of car requisition plans is the core and foundation for the preparation of railway daily freight traffic plans, whose preparation efficiency and quality can be improved by optimizing that approval, thereby improving the economic and social benefit of a railway. This paper comprehensively aims to achieve a set of optimization goals for building an automatic approval model of car requisition plans for one type of car, while satisfying a set of constraints. The constraints include the station loading capacity, station unloading capacity, requirement that the total number of approved cars be less than or equal to the planned total number of car loadings for the next day for the railway bureau, number of loaded cars to be delivered to other railway bureaus, throughput capacity of a demarcation station, throughput capacity of bottlenecks, suspension and restriction orders, loading restrictions according to goods category, requirement that the number of approved cars be less than or equal to the requisition number of cars for each batch of car requisition plans, number of empty cars that a station can offer other stations within the same railway bureau, the number of empty cars that a station can obtain from other stations within the same railway bureau, and the requirement that the total number of approved cars of a station be less than or equal to the total number of empty cars that it can make use of the next day. The optimization goals include maximizing the traffic revenue of the railway bureau and the sum of the priority scores of car requisition plans, while minimizing the running kilometers of repositioned empty cars within the railway bureau. LINGO software is used to solve this model accordingly. The feasibility of the model and algorithm is demonstrated for a specific case.

This paper was sponsored by TRB committee AR040 Freight Rail Transportation.

01550057

15-1497

English

20p

2015

Transportation Research Board 94th Annual Meeting

Digital/other

Figures; References; Tables

Car supply (Railroads); Computer models; Optimization; Railroad cars; Supply chain management

Administration and Management; Freight Transportation; Railroads; Vehicles and Equipment; I10: Economics and Administration; I90: Vehicles

Transportation Research Board Annual Meeting 2015 Paper #15-1497

TRIS, TRB, ATRI

Dec 30 2014 12:33PM