Determining real-time delay of transportation means

摘要

A delay of a scheduled transportation means which runs along a route according to a timetable is determined. The route comprises at least one leg. Determining the delay is based on a detailed reference schedule indicating arbitrary time-stamped reference positions of the transportation means being on time. A request is received for the transportation means' delay by a user device located on the transportation means. The request indicates at least the current position of the transportation means. The transportation means' delay is calculated on the basis of the current position indicated in the request, a time-stamp and the corresponding time-stamped reference position of the detailed reference schedule. The calculated delay is returned to the user device. The calculated delay is stored into a logbook. In response to a request not indicating the current position of the transportation means, the delay is returned on the basis of the logbook.