The bottleneck of the planning of public transport systems is the knowledge of user demand. This knowledge is usually missing or only partly known. To solve this problem we built up a method to estimate the travel demand in time and space with high reliability. It means the estimation of a time-dependent O-D matrix for public transport systems.
The method was checked in practice. It proved that the method is good enough to use it in the normal day-to-day work for planning public transport systems.