Mo. Rev. Stat. § 389.645

The division, upon application or complaint by a city, town or village, or upon its own motion, may regulate the crossing within a municipality of a highway, street or roadway with railroad tracks, require precautions, regulate the running, handling and operation of railway engines and cars, govern the speed of railway engines, cars and trains, and make and enforce orders and restrictions to promote public safety and convenience at such crossings and on such railroad tracks.