Mo. Rev. Stat. § 300.265: Other intersections where stop or yield required.

The city traffic engineer is hereby authorized to determine and designate intersections where particular hazard exists upon other than through streets and to determine whether vehicles shall stop at one or more entrances to any such intersection, in which event he shall cause to be erected a stop sign at every such place where a stop is required, or whether vehicles shall yield the right-of-way to vehicles on a different street at such intersection as prescribed in subsection 1 of section 300.280, in which event he shall cause to be erected a yield sign at every place where obedience thereto is required.