Okla. Stat. tit. 47, § 47-11-1115: Railroad-highway grade crossings – Class A, B or C

commercial vehicles – When crossing prohibited.

At a railroad-highway grade crossing, a person operating a Class

A, B or C commercial motor vehicle shall not negotiate the crossing

if there is:

1. Insufficient space to drive completely through the crossing

without stopping; or

2. Insufficient clearance for the undercarriage of the vehicle.