Mich. Comp. Laws § 257.643b: Leaving space between snowplows; passing exception; violation as civil infraction.

Sec. 643b.

(1) The operator of a vehicle shall not follow a snowplow more closely than 200 feet.

(2) Subsection (1) does not apply when the operator of a vehicle is legally overtaking or passing a snowplow.

(3) The operator of a vehicle that is not a snowplow who approaches a snowplow from the rear that is stopped at or in an intersection shall stop not less than 20 feet from the snowplow.

(4) A person that violates this section is responsible for a civil infraction.

(5) As used in this section, "snowplow" means a vehicle that is all of the following:

(a) Operating on behalf of this state, a county, a county road commission, or a municipality.

(b) Actively engaging in snow and ice removal, snowplowing, salting, or sanding.

(c) Operating lights as described in section 698(5)(d).