Facility	Financing or operating authority	Location	Length in miles
Interstate
Southern Connector	Connector 2000 Association	From I-385/US 276 to I-85 (Greenville)	16
Noninterstate
Cross Island Parkway (US 278)	SCDOT/Lockheed Martin IMS	From US 278 Business to US 278 Business (Hilton Head)	5

Transportation System Extent

All public roads: 64,921 miles
Interstate: 829 miles
Road bridges: 9,064
Class I railroad trackage: 2,127 miles
Inland waterways: 482 miles
Public use airports: 66 (11 certificated for air carrier operations)

Vehicles and Conveyances

Automobiles registered: 1.9 million
Light trucks registered: 1.1 million
Heavy trucks registered: 18,000
Buses registered: 16,000
Motorcycles registered: 52,000
Numbered boats: 384,000