Vooronderzoek verplaatsingen in het verkeer. Onderzoek in opdracht van de Stichting Wetenschappelijk Onderzoek Verkeersveiligheid SWOV.

A preliminary study was held to the methods by which the movements of people could be recorded and to the methods of conduct by the inquire. Four methods were studied. Persons were asked to record all their movements of one day, or one week. The method by which movements of one day were recorded was better on the whole, but the method is more expensive.