Missouri Revised Statutes Title XVIII. Labor and Industrial Relations § 293.130. Mine railroad equipment and operating requirements--gasoline engines limited

1. The roadbed, rails, and all other elements of the track of all haulage roads in mines shall be constructed, installed, and maintained in a manner consistent with speed and type of haulage operations being conducted to insure safe operation. Mine locomotives must be maintained so that brakes are adequate and in good order, sand riggings are operative and locomotives in safe operating condition. An audible warning device and headlights shall be provided on each locomotive and shuttle car and truck. A trip-light or reflecting signal shall be used on the rear of trips pushed or pulled by a locomotive and on the front of trips lowered into slopes. Other rolling stock must be maintained so that its condition does not entail undue hazards to transportation crews or to workmen whose duties require them to work around the haulage.

2. Gasoline engines shall not be used underground unless equipped with proper safeguards to prevent the emission of gases that cause a contamination of the air beyond the limits set forth in section 293.120.

3. Other than the motorman and trip rider, no person shall ride on a locomotive unless authorized by the mine foreman, and no person shall ride on loaded cars or between cars of any trip, except that the trip rider may ride on the last car.

4. Man trips shall not be run in excess of the speed determined by the director nor shall more men ride in any one car than the number ordered by the director.

5. Uniform haulage signals and a traffic control system shall be adopted for each mine or mines operated, and shall be complied with by all haulage crews.