Okla. Stat. tit. 47, § 47-11-702: Commercial motor vehicles and buses - Railroad

crossing.

A. The driver of a bus as defined in Section 1-105 of this

title, whether the bus is occupied or unoccupied by passengers,

shall not cross a railroad track or tracks at grade unless the

driver stops the bus within fifty (50) feet of, and not closer than

fifteen (15) feet to, the tracks, listens and looks in each

direction along the tracks for an approaching train or other on-

track equipment, and ascertains that no train or other on-track

equipment is approaching. When it is safe to do so, the driver may

drive the bus across the tracks in a gear that permits the bus to

complete the crossing without a change of gears. The driver shall

not shift gears while crossing the tracks.

B. Any commercial motor vehicle as defined in 49 C.F.R.,

Section 390.5, shall comply with the railroad crossing provisions as

prescribed in 49 C.F.R., Section 392.10.