Information makes the difference
The well-informed finds his way and is more mobile. The more data available, the better and - even more important - more detailed is the information provided for the passengers.
Any data - timetable data, geographical data and real-time data - can be fed into HAFAS and included for the journey information. Thus HAFAS is a door-to-door information that does not end at points in the network. As a matter of fact, passengers do not travel only from stop to stop, and their journeys will not always go according to plan.