Section 55-50-412 - Approaching and driving over a railroad highway grade crossing(a) It is unlawful for the operator of a commercial motor vehicle to fail to: (1) Slow down and check that the railroad highway grade crossing is clear of an approaching train, if the driver is not required by § 55-8-147 to always stop at the crossing;(2) Stop before reaching the railroad highway grade crossing, if the tracks are not clear, if the driver is not required to always stop, pursuant to § 55-8-147;(3) Have sufficient space to drive completely through the railroad highway grade crossing without stopping; or(4) Negotiate a railroad highway grade crossing because of insufficient undercarriage clearance.(b) A violation of this section is a Class C misdemeanor, punishable by a fine only.