Speed & Conditions
Posted limits assume good conditions, and Delaware's basic speed rule expects you to slow down when the road or weather is poor. Delaware is a compact state where the highest posted limit is 65 mph.
Common limits
Residential districts are commonly 25 mph unless posted otherwise, and the highest speed limit anywhere in Delaware, including its interstates, is 65 mph. Always obey the posted sign, which sets the legal maximum.
Basic speed rule
You must drive at a speed that is reasonable and prudent for actual conditions, even if that is below the posted limit. Traffic, weather, and visibility all affect a safe speed.
Adjusting to conditions
In rain, fog, or on icy roads, reduce your speed and increase your following distance because traction and visibility drop. Brake gently and avoid sudden steering on slick surfaces.