Realism and Adaptation in Designing Hypothetical travel Choice Concepts
For external validity, SP experiments need to present choices that are realistic for the respondents. The use of portable computers in interviewing has many advantages.
For external validity, SP experiments need to present choices that are realistic for the respondents. The use of portable computers in interviewing has many advantages.
The paper argues for a public Road Authority owning the highway infrastructure and holding debt. Present provisions for private roads lead to large distortions, and are unlikely to encourage private investment.
A literature review suggests that increases in real fuel prices would lead to a short run reduction in both traffic and consumption, due to more careful driving and differential responses for different journeys. In the longer run the effects would be increased. It is suggested that non-dynamic estimation methods are biased, and that transport prices have wider effects, and are a more important lever of transport policy, than has sometimes been assumed.