Starting July 1, drivers in Iowa are required to change lanes if possible or slow down when they approach any vehicle with flashing lights.
All 50 states have versions of this type of law commonly referred to as a “Move over” law. The laws are meant to protect workers and others who are along the side of the road from being hit by passing motorists. Iowa first put the law (Iowa Code 321.323) into effect in 2002. At that time it included only certain emergency and maintenance vehicles. Last year the law was expanded to include utility vehicles and others working alongside the roadway. The 2018 version now includes all vehicles displaying flashing or hazard lights, including private vehicles who may be stopped due to vehicle trouble or emergencies.