The Red Signal (French: Le signal rouge) is a 1949 French drama film directed by Ernst Neubach and starring Erich von Stroheim, Denise Vernac and Frank Villard.

The film's sets were designed by the art director Louis Le Barbenchon.

In a small Austrian town, physician Mathias Berthold is haunted by the memory of his wife who died in a train accident.

In a trance-like state he attempts to sabotage the railway tracks, and is shot and wounded by the police.

Doctor Irène Dreiser, who is sympathetic to Berthold, takes over his patients during his absence.