Features rare footage of a tug of war between two steam locomotives, actual documentary footage of the activities in the Miles City yard, and what is believed to be the only motion picture footage of a dynamometer car from the steam railroad era.
In the 15 December 1930 New York Times review of the film, critic Mordaunt Hall wrote that Danger Lights was "pictured" in the Spoor-Berggren process, adding that the film filled the screen from side to side of the Mayfair Theatre in New York City. Hall included a paragraph giving technical information about the wide-screen process.
This film was photographed and released in two formats: a standard 1.33:1 version in 35 mm., and a 2:1 Spoor-Berggren Natural Vision Process (wide-screen version) in 65 mm, shown only at the the State Lake Theatre in Chicago, Illinois, in November 1930, and the Mayfair Theatre in New York City in December 1930.