The Multinomial Logit, discrete choice model of transport demand, has several restrictions when compared with the more general Multinomial Probit model. The most famous of these are that unobservable components of utilities should be mutually independent and homoskedastic. Correlation can be...

In this paper we report on two applications of the willingness-to-pay (WTP) approach to valuing transport externalities in Santiago, Chile. The first involves a contingent valuation study of mortality risk due in part to pollution-related causes, and the second, a stated preference study for...

Mixed-logit models are currently the state of the art in discrete-choice modelling, and their estimation in various forms (in particular, mixing revealed-preference and stated-preference data) is becoming increasingly popular. Although the theory behind these models is fairly simple, the...

We examined different model specifications to detect the presence of preference heterogeneity in a mode choice context. The specification that worked best allows for both systematic and random variations in tastes. Using parameters obtained at the individual level through Bayesian inference...

We study the use of bicycles as an alternative mode of transport in Santiago. We consider the incorporation of a dense network of cycle-ways, fully segregated from motorised traffic, and the inclusion of adequate bicycle shelter facilities at Metro, suburban train and selected segregated bus-way...

We treat the problem of fitting alternative specific constants (ASC) in models estimated with a mixture of revealed preference (RP) and stated preference (SP) data to forecast the market shares of new alternatives. This important problem can have non-trivial solutions, particularly when some of...

The value of fatal risk reductions is a vital input for road safety cost-benefit analysis and has been traditionally estimated by means of contingent valuation in spite of the growing criticism surrounding this approach. Furthermore, many scholars believe that risk-money trade-offs are not well...

This paper examines variations in travellers' choice of transport mode for inter-island trips when journey conditions are changed, either in the total time spent on the journey, the fare level, or in the provision of additional supply. The route studied is the route between Gran Canaria and...

Random utility models are typically based on the assumptions that individuals exhibit compensatory behaviour and that their choice sets are pre-specified. These assumptions may be unrealistic in many practical cases; in particular, it has been argued that thresholds may be part of...