Extended applicability of the departure time model
With a suitable infrastructure, a stop-based departure display can also be seen by passengers in arriving lines – before alighting. In this case, the choice model Information on departure times (Information on departure times) is not just applied to the possible transfer lines, which are available after alighting. In fact, it already refers to the decision of the passenger still on board, because by acknowledging the departure times early enough, the passenger can judge whether continuing the journey on the same line is more profitable than getting off. This also applies if information on connections provided at the next stop is displayed in the vehicles.
Another relevant difference in cases is the question, whether passenger information systems at a stop only display departure times of those lines which depart from just this stop. In some places, displays are used which also include the departures of other lines, departing at stops close-by. An example of this is the display of departures of subway lines in the concourse.
Are both of these features provided, also a passenger who is still on board of a line knows the next departure times of all potential transfer lines at the current stop and at those which can be reached by foot from this stop. The model is then applied to the total set of available lines. The technical realization of such a level of information can for example be a service, which provides via cell phone the information on the current timetable and - on the basis of operational real-time data - a recommendation for the passenger. A completely different model assumption, which nevertheless leads to the same level of information, is the passenger's knowledge of the timetable.
The border case of complete passenger information is provided if the situation described above is also assumed, when the passenger is still at the starting point (thus in the origin zone) of his journey. In order to observe also the departure times of the possible boarding lines from there, again a mobile information service or complete knowledge of the timetable have to be assumed.