D5 Annex report WP 7: ETISDatabase methodology ... - ETIS plus

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D5 Annex WP 7: ETIS DATABASE METHODOLOGY AND DATABASE USER MANUAL – PASSENGER TRANSPORT SUPPLY the airports, transfer times for mode changes, destinationspecific checkin times, and the frequency of connections are all considered in the model. Travel impedances for the rail mode between the NUTS2 centroids and the main train station, as well as to/from the airports, have been requested from IVT, based on the train type, frequency, and travel time. Impedance is a utility function which accounts for how people value the tradeoff of, in this case, comfort, travel time, and frequency. The determination of the utility function for travel time, train type, and frequency would require a dataset of revealed or stated travel preferences by travel purpose for a type of train and a frequency of service. Such data is not available to IVT. The method for deriving impedances for rail will be a subject of iteration between IVT, IWW and Mkm. IVT can deliver the necessary information as follows. The determination of train type is not important for the mode choice model and the assignment models for the air mode. But it is important in determining the travel cost for rail in the work of IWW. IVT can deliver the shortest rail travel times and the associated train frequencies and train type, for service between the train stations and the NUTS centroids and the airports. The train type information can be used to calculate the travel cost for rail. The model of the air mode, which relies on access/egress impedance for each flight connection, can use the frequency and travel time information as well as the calculated cost. 20 R20040089.doc 27 May 2004
D5 Annex WP 7: ETIS DATABASE METHODOLOGY AND DATABASE USER MANUAL – PASSENGER TRANSPORT SUPPLY Figure 4.1 IVT rail network model The determination of the rail travel times between NUTS2 centers is straightforward. The time from the NUTS2 centroid to the main train station is added to the rail travel time between NUTS2 centroids. These travel times between main train stations in the NUTS2 regions will be the shortesttime connections as extracted from national rail schedules using the Hafas server. 4.3.3 Passenger travel time, costs and frequencies air transport Travel impedances with the main mode air mostly form part of an intermodal travel chain as airports, the nodes of an air transport network – in comparison to other modes – are far less allocated allover Europe than railway stations or road crossings. The specific peculiarity of the air mode and the conception in ETIS of an air trip as part of an intermodal trip chain is illustrated by Figure 4.2. R20040089.doc 27 May 2004 21
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D5 Annex report WP 7: ETISDatabase methodology ... - ETIS plus

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