(a) Crossing surfacing systems shall be based on the type and volume of rail and highway traffic. Acceptable crossing surfacing systems include:
(b) Surfacing systems installation shall comply with manufacturer and railroad specifications.
(c) The crossing surfacing system shall be adjusted or replaced whenever the distance between the crossing surface and the top of the rail exceeds 2 inches.
(d) The surfacing system shall be as wide as the roadway travel lanes plus usable shoulders, but not less than 18 feet.
(e) The surfacing system between the rails and extending 2 feet on the outside of the rails shall be level with the approach grade.
(f) The surfacing system for multiple tracks shall be constructed to minimize the stair-step effect caused by the different rail elevations.
045-1 Wyo. Code R. § 1-14