Mo. Rev. Stat. § 389.620
Whenever any city, town or village in this state, whether acting under special charter or organized under the general incorporation laws relating to cities, towns and villages, shall, by ordinance duly enacted order any street, alley, avenue, public highway or sidewalk now existing therein or which may hereafter be created and opened for public use, or any part or parts thereof, to be graded, constructed, reconstructed, paved, guttered, curbed or otherwise improved or repaired, it shall be the duty of every railroad corporation owning, operating or leasing any railroad which abuts or adjoins any such street, alley, avenue, public highway or sidewalk, to grade, construct, reconstruct, pave, gutter, curb or otherwise improve and repair the part or parts of such street, alley, avenue, public highway or sidewalk upon which the right-of-way of such railroad so abuts or adjoins, to the same extent, of like materials and of as good quality, as such city, town or village has required, or shall in such ordinance require, of the other property owners abutting upon such street, alley, avenue, public highway or sidewalk in the grading, constructing, reconstructing or otherwise improving or repairing of such street, alley, avenue, public highway or sidewalk.
§ 389.620, RSMo