This industry comprises government establishments primarily engaged in the administration, regulation, licensing, planning, inspection, and investigation of transportation services and facilities. Included in this industry are government establishments responsible for motor vehicle and operator licensing, the Coast Guard (except the Coast Guard Academy), and parking authorities. Cross-References. Government establishments primarily engaged in-- ? Operating airports, railroads, depots, ports, toll roads and bridges, and other transportation facilities--are classified in Sector 48-49, Transportation and Warehousing; ? Operating parking lots and parking garages--are classified in Industry 812930, Parking Lots and Garages; ? Operating automobile safety inspection and emission testing facilities--are classified in Industry Group 8111, Automotive Repair and Maintenance; ? Building and/or maintaining roads and highways--are classified in Industry 237310, Highway, Street, and Bridge Construction; ? Providing air traffic control services--are classified in U.S. Industry 488111, Air Traffic Control; and ? Operating weigh stations--are classified in Industry 488490, Other Support Activities for Road Transportation.