Swiss values of travel time savings
- Publisher: IVT, ETH Zürich
Values of travel time savings
This study was conducted by the Institute of Transport Planning and Systems (IVT), ETH Zurich and Rapp Trans AG, Zurich on behalf of the Swiss Association of Transport Engineers. It implements the recommendation of the scoping study on Swiss value of travel time savings (VTTS) (Abay und Axhausen, 2000) by estimating VTTS for private motorised and public travel by trip purpose on the basis of new stated-choice (SC) surveys. The survey participants were recruited as part of the continuous passenger travel survey (KEP) of the Swiss Federal Railways (SBB). The designs of the SC experiments were tested in two pre-tests. The experiments were customised and were based on one of the trips reported in the KEP survey. The final estimates are derived from a set of complex models, which were carefully developed from a whole series of models. The recommended choice model considers inertia variables, random parameters for travel costs and elasticity parameters of income and distance besides the attributes of the alternatives. The trip purpose specific estimates are obtained by interacting the travel time variable with trip purpose (commuting, shopping and leisure travel). The valuation of travel time savings for business trips was determined by ratios taken from other studies. The values relate to 2003.