page_title: Delaware State Route System
section_title: Highway systems
hierarchical_section_title: Delaware State Route System / Highway systems
caption_attribution_description: English: Raster image of a Delaware Byways marker
context_page_description: The Delaware State Route System consists of roads in the U.S. state of Delaware that are maintained by the Delaware Department of Transportation. The system includes the portions of the Interstate Highway System and United States Numbered Highways system located in the state along with state routes and other roads maintained by DelDOT. All roads maintained by the state are assigned a maintenance road number that is only marked on little white markers at intersections and on auxiliary plates below warning signs approaching intersections. These numbers are only unique in a specific county, some roads can be designated with multiple road numbers, and numbers do not necessarily correspond to the signed Interstate, U.S., or state route numbers. DelDOT maintains a total of 5,386.14 miles of roads, comprising 89 percent of the roads within the state. Some large bridges in the state are maintained by other agencies including the U.S. Army Corps of Engineers and the Delaware River and Bay Authority. Roads in the system include multilane freeways, multilane surface divided highways, and two-lane undivided roads serving urban, suburban, and rural areas.
context_section_description: The Delaware State Route System includes Delaware's portion of the Interstate Highway System and U.S. Highway System along with state routes. The system also includes special routes of the U.S. and state routes, such as alternate, business, and truck routes. These routes consist of a banner denoting the type of special route above the route marker. Alternate routes provide a second alignment of a route between two points. DE 10 Alternate provides an alternate routing to DE 10 between Willow Grove and Rising Sun by passing through Woodside while DE 10 passes through Camden. Business routes pass through the business area of a city while the main route bypasses it. DE 1 Business passes through the central portion of Milford while DE 1 bypasses the city to the east. Truck routes provide an alternate route for trucks around a certain portion of a route. DE 14 Truck provides a route for truck traffic that bypasses the section of DE 14 that passes through Harrington. Suffixed routes also exist for short alignments that branch off their parent routes, in which a letter suffix is added after the route number. DE 1 has three suffixed routes in the Rehoboth Beach area while DE 9A provides access to the Port of Wilmington from DE 9. In addition to these systems are other state roads designated with a maintenance road number.
  DelDOT maintains a total of 5,386.14 miles (8,668.15 km) of state roads within Delaware, which comprises 89 percent of all roadway mileage in the state. Some exceptions to DelDOT maintenance include the bridges over the Chesapeake and Delaware Canal, which are maintained by the U.S. Army Corps of Engineers, and the Delaware Memorial Bridge, which is maintained by the Delaware River and Bay Authority (DRBA). A total of 338.19 miles (544.26 km) of Delaware's roadways are part of the National Highway System, a system of highways important to the United States's economy, defense, and mobility. This system includes all the Interstate Highways in Delaware, other principal arterials which connect to intermodal transportation facilities, and the Strategic Highway Network which provides connections to major military facilities in the United States. The longest route overall in Delaware is US 13 at 103.33 miles (166.29 km), with DE 1 being the longest state route at 103.02 miles (165.79 km). At a length of 23.43 miles (37.71 km), I-95 is the longest of Delaware's three Interstate Highways. The shortest route is DE 491 at 0.36 miles (0.58 km).
  The roads maintained by DelDOT include Interstate Highways, other freeways, arterial roads, collector roads, and local roads serving both urban and rural areas. Delaware has a total of 40.61 miles (65.36 km) of freeway considered part of the Interstate Highway System. Non-Interstate freeways in the state include the portion of DE 1 between Dover Air Force Base and Christiana, the section of DE 141 between south of Newport and Prices Corner, and the Puncheon Run Connector that links US 13 and DE 1 in Dover. Three toll roads exist in the state. A mainline toll plaza is located along the Delaware Turnpike portion of I-95 near the Maryland border in Newark. Tolls are also collected along the DE 1 freeway, with mainline toll plazas at Dover and Biddles Corner and ramp tolls at North Dover, South Smyrna, and Boyds Corner. Tolls along I-95 and DE 1 may be paid with cash or an electronic toll collection system known as E-ZPass. The US 301 toll road runs from the Maryland border near Middletown northeast to DE 1 in St. Georges. US 301 uses all-electronic tolling, where tolls are paid with E-ZPass or toll-by-plate, which uses automatic license plate recognition to take a photo of the vehicle's license plate and mail a bill to the vehicle owner. The road has a mainline toll gantry north of the Maryland border and ramp toll gantries on the southbound exits and northbound entrances at the DE 299, DE 71, and Jamison Corner Road interchanges. The DRBA also collects tolls for the Delaware Memorial Bridge for motorists entering Delaware from New Jersey using cash or E-ZPass. Highways and other transp
caption: Delaware Byways marker
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