The compatibility between economic growth and the development of a more sustainable transport system requires great investment efforts by public authorities.

Capacity for efficient decision taking depends on the level of knowledge about the transport demand, as well as its precision on associated socio-economic benefits and costs to different possible performances (cost-benefit analysis, CBA).

Time savings are one of the best benefits derived from investments in transport infrastructures, both in passenger transport scope and in goods transport scope. Although it is the main benefit of the majority of investments in transport infrastructures, the researchers have not been able to reach consensus, neither about the magnitude nor about the nature of the travel and transit time values which should be used in the evaluation of projects.