Mo. Rev. Stat. § 172.747
172.747 Board of curators to publish and distribute traffic regulations — speed ...
172.747. Board of curators to publish and distribute traffic regulations — speed limit signs to be posted. — The regulations established by the board of curators shall be codified, printed and distributed for public use. Adequate signs displaying the speed limit shall be posted along such thoroughfares.
(L. 1985 H.B. 288, et al. § 3)