The SNCF is for regional and national train (with the exception of the RER) where the possibility of having a cow coming on the rail is non-negligible ... or a hot air ballon landing on the rail and stopping the Nantes-Paris lines for a whole morning :D .
So I think it is a much, much harder environment to automate. Paris do have some metro line that are fully automatic (line 1 at least) and both Rennes metro lines are fully automatic. It is much easier to control the environment around a metro and ensure that nothing can go on the rails, and have surveillance system to check if, if it does happen, it is detected ASAP.
So I think it is a much, much harder environment to automate. Paris do have some metro line that are fully automatic (line 1 at least) and both Rennes metro lines are fully automatic. It is much easier to control the environment around a metro and ensure that nothing can go on the rails, and have surveillance system to check if, if it does happen, it is detected ASAP.