The transportation system in Delaware is under the governance and supervision of the Delaware Department of Transportation, also known as “DelDOT”. DelDOT manages programs such as a Delaware Adopt-a-Highway program, major road route snow removal, traffic control infrastructure (signs and signals), toll road management, Delaware Division of Motor Vehicles, the Delaware Transit Corporation (branded as “DART First State”, the state government public transportation organization), among others. Almost ninety percent of the state’s public roadway miles are under the direct maintenance of DelDOT which far exceeds the United States national average of twenty percent for state department of transportation maintenance responsibility; the remaining public road miles are under the supervision of individual municipalities.

One major branch of the U.S. Interstate Highway System, Interstate 95, crosses Delaware southwest-to-northeast across New Castle County. In addition to I-95, there are six U.S. highways that serve Delaware: U.S. Route 9, U.S. Route 13, U.S. Route 40, U.S. Route 113, U.S. Route 202, and U.S. Route 301. There are also several state highways that cross the state of Delaware; a few of them include Delaware Route 1, Delaware Route 9, and Delaware Route 404. U.S. 13 and DE Rt. 1 are primary north-south highways connecting Wilmington and Pennsylvania with Maryland, with DE 1 serving as the main route between Wilmington and the Delaware beaches. DE Rt. 9 is a north-south highway connecting Dover and Wilmington via a scenic route along the Delaware Bay. U.S. 40, is a primary east-west route, connecting Maryland with New Jersey. DE Rt. 404 is another primary east-west highway connecting the Chesapeake Bay Bridge in Maryland with the Delaware beaches. The state also operates two toll highways, the Delaware Turnpike, which is Interstate 95 between Maryland and New Castle and the Korean War Veterans Memorial Highway, which is DE Rt. 1 between Dover and Interstate 95 between Wilmington and Newark.

A bicycle route, Delaware Bicycle Route 1, spans the north-south length of the state from the Maryland border in Fenwick Island to the Pennsylvania border north of Montchanin. It is the first of several signed bike routes planned in Delaware.

Delaware has around 1,450 bridges, of which ninety-five percent are under the supervision of DelDOT. About thirty percent of all Delaware bridges were built prior to 1950 and about sixty percent of the number are included in the National Bridge Inventory. Some bridges not under DelDOT supervision includes the four bridges on the Chesapeake and Delaware Canal, which is under the jurisdiction of the U.S. Army Corps of Engineers, and the Delaware Memorial Bridge, which is under the bi-state Delaware River and Bay Authority.

The public transportation system, DART First State, was named “Most Outstanding Public Transportation System” in 2003 by the American Public Transportation Association. Coverage of the system is broad within northern New Castle County with close association to major highways in Kent and Sussex Counties. The system includes bus, subsidized passenger rail operated by Philadelphia transit agency SEPTA, subsidized taxi and paratransit modes, the latter consisting of a state-wide door-to-door bus service for the elderly and disabled. Passenger rail service on SEPTA’s R2 Regional Rail line is limited to a single southwest-to-northeast line on the Northeast Corridor in New Castle County serving Claymont, Wilmington, Churchmans Crossing, and Newark.

There are two ferries that opeate in the state of Delaware. The Cape May-Lewes Ferry crosses the mouth of the Delaware Bay between Lewes, Delaware and Cape May, New Jersey. The Woodland Ferry is a cable ferry that crosses the Nanticoke River southwest of Seaford.

Amtrak has two stations in Delaware along the Northeast Corridor; the relatively quiet Newark Rail Station in Newark, and the busier Wilmington Rail Station in Wilmington. The major freight railroad in Delaware is the Class 1 Norfolk Southern, which provides service to most of Delaware. It connects with two shortline railroads, the Delaware Coast Line Railway and the Maryland & Delaware Railroad. These two shortlines serve local customers in Sussex County. Another Class 1 railroad, CSX, passes through northern New Castle County parallel to the Amtrak Northeast Corridor.

Delaware has lacked air service from major carriers since 2000. On June 29, 2006, Atlantic Southeast Airline, a subsidiary of Delta Air Lines, began two-a-day flights between Atlanta’s Hartsfield International to New Castle Airport.