Abstract: Installation for controlling trains defining allocated cross-overs with conductor loops, in accordance with a normal program P1n and an interference program P2n. Installation characterised in that the ground equipment of each block comprises a frequency generator GF producing a normal mode frequency F1, an interference mode frequency F2 and a frequency F3 to be modulated, supplying a mode selector SM, so as to provide a frequency signal FSn as a function of an occupation signal OCC (n+1) received by the mode selector SM and correspondin g to the occupation of the following block Cn+1, as well as a frequency signal PPn enabling the interference program P2n to be read, and the equipment fitted on board each train comprises a logical emergency-braking circuit CLF.