Greater London Photos
Southern 377606, with SDO (Selective Door Operation) seen at Belmont station
Here you can see SDO in operation.
This train is formed of 10 coaches but the platform is only able to take 8 coach trains. SDO is programmed to allow the driver to release the correct number of doors that are actually on the station platform. The system works with the on-train’s GPS system and triggers the appropriate on board announcement to warn passengers they must be in coaches 1 to 8 to alight from the train. Station lengths vary across the network so a number of varied announcements can be heard whilst onboard.
Southern 377606, with SDO (Selective Door Operation) seen at Belmont station
Here you can see SDO in operation.
This train is formed of 10 coaches but the platform is only able to take 8 coach trains. SDO is programmed to allow the driver to release the correct number of doors that are actually on the station platform. The system works with the on-train’s GPS system and triggers the appropriate on board announcement to warn passengers they must be in coaches 1 to 8 to alight from the train. Station lengths vary across the network so a number of varied announcements can be heard whilst onboard.