340 / | HD | COMMUNICATIONS: ELECTRICAL |
|
988 | DF | VEHICLE POSITION INDICATION {3} |
989 |  | .~ At remote location {5} |
990 | DF | .~.~> With map display |
991 | DF | .~.~> Position indication transmitted by vehicle after receipt of information from local station |
992 | DF | .~.~> Position indication transmitted at periodic intervals (e.g., distance travelled) |
993 | DF | .~.~> Position indication transmitted by local station to remote location |
994 | DF | .~.~> Vehicle's arrival or expected arrival at remote location along route indicated at that remote location (e.g., bus arrival systems) |