Okla. Stat. tit. 69, § 69-1314: Railroads and street railways to pave - Warning signals

(a) When a railroad or railway shall occupy any portion of a

limited access facility with its tracks, either running in a general

direction thereto or otherwise, the governing body or the board of

county commissioners or the Commission may require such railroad or

railway company to pave so much of the facility as may be occupied

by its track or tracks and three (3) feet on each side, and when

more than one track crosses within a distance of (one hundred) 100

feet, measuring from inside rail to inside rail, the company shall

grade, gutter, drain, curb, pave or otherwise improve between its

tracks in the same manner as the facility itself.

(b) The Corporation Commission of the State of Oklahoma may

require warning signals at grade crossings at intersections of

railroad and limited access facilities and may require grade

separations at intersections of railroads and limited access

facilities. The determination of whether such warning signals and

grade separations shall be required, the location thereof, the type

thereof, and the distribution of the cost thereof shall be

determined by the Corporation Commission in accordance with the

provisions of 17 O.S.1961, Sections 81 to 84, inclusive.