IT Systems in Public Transport by Gero Scholz

Author:Gero Scholz
Language: eng
Format: epub
Publisher: dpunkt.verlag GmbH
Published: 2016-11-15T00:00:00+00:00

Fig. 8-2 Traffic jam and short turnaround

Headway regulation

The example shows the possibilities and limits of the inner/outer control circuit. The decision to turn at point C/C’ might have been taken by the driver himself – at least this is conceivable in non-railbound transport. But only the control centre is able to evenly distribute the vehicles on a new headway – provided it knows the position of all vehicles.

Monitoring connections

A second example for the outer control circuit is the monitoring of connections. Connections are defined in the planning and often also published in the timetable. Vehicles cannot make their own contribution to the monitoring of connections: the drop-off vehicle knows that he may have passengers on board who want to transfer at a certain point; if it is delayed, however, there is nothing left for it to do than to contact the control centre. As the control centre knows the vehicle’s timetable situation and monitors the connections anyway, this is not necessary.

Multistage control

Connection management is a very important central task. It is often carried out in several stages.

The control system automatically keeps the pick-up vehicle in place within a certain tolerance range until all of its drop-off vehicles have arrived. To do this, it communicates with the on-board computer, which gives the driver of the pick-up the corresponding information. You can even automatically activate standard announcements for the passengers ( “We are still waiting for delayed transfer passengers ...” ).

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