Michigan Compiled Laws, Chapter 257. Motor Vehicles § 257.669a

Sec. 669a. (1) This state adopts motor carrier safety regulations 49 C.F.R. 392.10 and 392.11 on file with the office of the secretary of state, to provide for the safe transportation of persons and property over railroad-highway grade crossings with the intent of following the policies and procedures of the United States department of transportation's federal motor carrier safety administration as they relate to title 49 of the code of federal regulations. For purposes of this subsection, “commercial motor vehicle” means that term as defined in section 7a.  1

(2) The driver of a commercial motor vehicle shall comply with a lawful order or direction of a police officer guiding, directing, controlling, or regulating traffic at a railroad-highway grade crossing.

(3) The driver of a commercial motor vehicle shall not cross a railroad-highway grade crossing unless the vehicle has sufficient undercarriage clearance.

(4) The driver of a commercial motor vehicle shall not cross a railroad-highway grade crossing unless the vehicle can be driven completely through the crossing without stopping.

(5) A person who violates this section is responsible for a civil infraction.