ATP( Automatic Train Protection) Features of ATP are 1) Detection and Prevention of SPAD. 2) Cab Signalling with display of movement authority, target distance, speed and signal aspect. 3) Continuous train control 4) Prevention of speed restriction. 5) Detection of roll back 6) Blowing horn while approaching LC gate . Track Side Equipment of ATP a) RFID Tag b) Stationary unit c) Radio As per RDSO Specification, RFID tag shall have minimum ingression protection level of IP 68 . Maximum distance between two normal tags in Block Section is 1000 m On board Equipment of ATP a) On Board Computer ( OBC) b) RFID reader consisting of two RFID Reader in hot standby. c) Driver Machine Interface( DMI), indications and non-resettable counters. d) Loco radio units consisting of two Radio Modems in hot standby with seperate cables and antenna for each radio. e) Pulse Generators( Speed Sensors) f) Train Interface Unit ( TIU) g) Interface to existing brake controls application of Normal/service/em