Relating to: operation of all-terrain and utility terrain vehicles, off-highway motorcycles, and snowmobiles and revision of the Department of Transportation highway maintenance manual.

SB 331 updates rules for operating all-terrain vehicles (ATVs) and utility terrain vehicles (UTVs) by creating new definitions for specific vehicle types, including "dune buggies" and emergency-use vehicles operated by public safety agencies. The bill requires ATVs to have one headlight and tail light (with lights on), UTVs to have two of each with specified visibility standards (200 feet for headlights, 500 feet for tail lights), and mandates functional brakes for all vehicles. It also prohibits modifications that exceed width limits (except on private property) and adds a requirement for operators to render aid after accidents.