Matters relating to airports and aviation; boats and boating; licensing of motor vehicles; operators and trailers; financial responsibility law; nonresident motorists; motor vehicle sales; railroad rates, service and operating regulations; motor carriers; matters pertaining to the construction and maintenance of the state highway system; the Transportation Cabinet; state aid for local roads and streets; the state police; the Federal Highway Safety Law; turnpike authority; state and federal highways; limited access facilities; use of road bond monies; bill boards; automobile recyclers; highway beautification; bridges, tunnels and ferries; traffic regulations; vehicle equipment and storage; driver training schools.