Transportation System Extent

All public roads: 83,471 miles
Interstate: 678 miles
Road bridges: 6,032
Class I railroad trackage: 986 miles
Inland waterways: 75 miles
Public use airports: 74 (9 certificated for air carrier operations)

Vehicles and Conveyances

Automobiles registered: 380,000
Light trucks registered: 317,000
Heavy trucks registered: 17,000
Buses registered: 2,700
Motorcycles registered: 29,000
Numbered boats: 51,000