Mo. Rev. Stat. § 388.320: Power to construct roads, connect with, intersect or cross other lines — duty to receive each other's freight.

Any railroad corporation or association, organized for the purpose, shall have the right to construct and operate a railroad between any points within this state, and to connect at the state line with railroads of other states; and shall have the right, with its road, to intersect, connect with or cross any other railroad, and shall receive and transport each other's passengers, tonnage and cars, loaded or empty, without delay or discrimination.