However, with a new mayor on the horizon for Rockford, some residents are beginning to ask whether it's time for Rockford to consider its approach. Montana Offers a Different ModelOne city I often refer to in conversations about legal ATV use on public streets is Billings, Montana. It's about the same size as Rockford, and there, properly registered all-terrain vehicles and utility vehicles can legally operate on city streets under local ordinances and Montana law. If ATV's were legalized on the city streets of Rockford, some say this would give residents another option for transportation. For now, Illinois law and local ordinances prohibit operating all-terrain vehicles on Rockford city streets, but that could change if the new mayor turns out to enjoy riding side-by-sides and ATV's.