Location: Warwick Rd and Levels Rd, Middletown Reassurance shield after the 15 split. 301/299 traverses the northern edge of the Middletown city limits for a while, so to the right is New Castle County and to the left is Middletown. Location: Warwick Rd and Middle Neck Rd, New Castle Cty As we head out of … Continue reading Former U.S. Route 301, DE 15 to DE 299