Abstract :
Making 7770 miles of railway in the United States safe against train collisions is no trivial task The accomplishment, as announced by the Interstate Commerce Commission July 28, marks the progress of the first quarter century of automatic train control in this country. This announcement registers the fact that after many years of heartbreaking experiment with all sorts of strange devices for stopping trains from running into danger, electricity has proved the only agency whereby this can do it. Hence the Commission has now given approval for train control schemes protecting 7770 track miles. How fast the Commission may order the rest of the country´s mileage under automatic train control remains to be seen.