DE 9 begins at a diamond interchange with DE 1 just south of the toll road terminus at the south end of Dover Air Force Base in the city of Dover in Kent County. Past DE 1, the route heads north-northeast on two-lane undivided Bayside Drive.
DE 9 commences at a diamond interchange with DE 1 just south of the toll road endpoint near the southern edge of Dover Air Force Base in the city of Dover within Kent County. After passing DE 1, the route proceeds north-northeast on a two-lane undivided Bayside Drive.