Freight Traffic on the STOREB~LT Fixed Link
FOSGEREAU M, COWl, Denmark
The Storebealt Fixed Link presently under construction consists of a 20 km combined bridge and tunnel for rail and road traffic and is expected to be completed in 1998. The combined bridge and tunnel will provide the first fixed link between East and West
The Storebealt Fixed Link presently under construction consists of a 20 km combined bridge and tunnel for rail and road traffic and is expected to be completed in 1998. The combined bridge and tunnel will provide the first fixed link between East and West Denmark.
Freight transport between East and West Denmark is presently served by seven ferry lines. In the future situation most of these will remain to compete with the Fixed Link.
A/S StorebeaIt, the company operating the Fixed Link, has commissioned a model system in order to be able to determine the optimal pricing structure for the link and to assess !he !mpact of competitive moves from ferry operators such as price reductions or service Improvements. A model system has been developed by a consortium consisting of COWI, Carl Bro and the Danish Road Directorate, with COWl having main responsibility for the freight models.
This paper concerns part of the model system for freight traffic. The model system comprises models for mode and route choice and for general and induced traffic growth. The model for mode and route choice is the subject of this paper.
The model is based on a large RP data set. However, certain issues with the RP data necessitate an auxiliary parameter estimation using SP data. One issue is that freight shippers receive substantial discounts on ferry fares which they are often not willing to disclose. The SP exercise demonstrates how this kind of information can be revealed.
It is usually quite difficult to model mode choice adequately for freight transport. In the model, mode and route choice is combined into a simultaneous structure with good results. The logsum accessibility measures from route choice are very significant in explaining mode choice.
The model structure contains mode choice and two different route choices, one for loaded trucks and one for empty returning trucks. The two route choices are combined into the model structure such that they both affect mode choice proportionally to the numbers of loaded and empty trucks while being independent of each other.
Association for European Transport