Speed limit in Delaware – National Speed Limit in Delaware

In Delaware, three roads carry a 65 mph (105 km/h) maximum speed limit: I-495, the toll road portion of Delaware Route 1, and Interstate 95 from the Maryland line to the southern junction with I-495. The remainder of I-95 between the southern junction with I-495 and the Pennsylvania line and the freeway portion of Delaware Route 141 are 55 mph (89 km/h) while Interstate 295 is 50 mph (80 km/h). The speed limit on Interstate 95 is 65 mph (105 km/h) between the Maryland state line and the I-495 interchange.

All rural two-lane state-owned roads have 50 mph (80 km/h) speed limits, while all urban speed limits, regardless of location, are held at 25 mph (40 km/h) for two-lane roads and up to 35 mph (56 km/h) for four-lane roads. Four lane highways such as US 13, US 113, portions of US 40 near Bear and Glasgow, and the at-grade portions of DE 1 are normally 55 mph (89 km/h).

School zones have 20 mph (32 km/h) speed limits.

Interstate 495, which forms a bypass around Wilmington, features changeable speed limit signs for environmental purposes. These signs typically display a 65 mph (105 km/h) speed limit, but this limit changes to 55 mph (89 km/h) on days when air quality is a concern. The limit is also lowered during construction, weather conditions, and when accidents occur.

All neighborhoods and subdivisions in Delaware have a maximum speed limit of 25 mph (40 km/h) as set by state law. Frequent ad campaigns on in-state radio stations remind residents of this.