Abstract
Home- work trips take place on a regional scale. This causes a concentration of traffic in time and space, which often leads to congestion. A policy aimed on adaptation and extension of infrastructure has to be sustained by a policy aimed on time management. The unpredictability of the trip duration appeared to be a minor factor. Most of the people are willing to change their working hours with more than a whole hour, above all when they can use a route without any congestion.