Some systems even take door operation away from the operator and give it to the ATO system so additional equipment is provided as shown in Fig 6 below. When the train has stopped, it verifies that its brakes are applied and checks that it has stopped within the door enabling loops. These loops verify the position of the train relative to the platform and which side the doors should open. Once all this is complete, the ATO will open the doors. After a set time, predetermined or varied by the control centre as required, the ATO will close the doors and automatically restart the train if the door closed proving circuit is complete.
Some systems have platform screen doors as well.
ATO will also provide a signal for these to open once it has completed the on-board checking procedure. Once door operation is completed, ATO will then accelerate the train to its cruising speed, allow it to coast to the next station brake command beacon and then brake into the next station, assuming no intervention by the ATP system. To the Previous page on Signalling. To the Next page on Signalling. To the Top of this page To the Home Page .