The SAE (Operational Help System) is a tool that combines the latest innovations in the fields of IT and telecommunications to help control vehicle position via satellite, regulate vehicle circulation and improve communications from the Traffic Regulation Centre (CRT) which TMB has set up at La Sagrera.

The system can be used to know the real situation of the vehicles connected to it from a central control area, find them using GPS and help complete information on the frequency with which they arrive at established bus stops. The bus driver also receives this information on a screen located on the control panel.

This type of new technology allows us to transmit information to the stops about the time it will take for the next bus on any line to arrive.