The video is Encyclopaedia Britannica Films newsreel called Arteries of New York City. The exact date of the movie is unclear – the copyright says 1941 but according to the Youtube description some footage is late 1940s. Presumably extra footage was added at some stage.
Check out the subway flows at 3:27, same thing for suburban trains at 4:32, and the bridge/road drawings starting 6:18 . All very low tech – but not a million miles from what folk are putting together today.