 Delaware Route 1 Business ( DE 1 Bus . ) is a business route of DE 1 that runs through Milford . DE 1 Bus. starts at a partial interchange with DE 1 southeast of Milford in Sussex County , with access to southbound DE 1 and from northbound DE 1 . From this interchange , the route heads northwest into Milford as two @-@ lane undivided Rehoboth Boulevard , passing residential subdivisions . The road continues past homes and some businesses , passing to the east of Marshall <unk> before reaching an intersection with DE 36 . DE 1 Bus. curves north before it heads northwest into wooded areas and passes over the Mispillion River on a drawbridge , at which point it enters Kent County . The route heads into business areas and crosses DE 14 . The road continues past commercial establishments and turns north onto North Walnut Street . DE 1 Bus. passes to the west of Milford High School and heads north to an intersection with US 113 , at which point it becomes concurrent with that route on four @-@ lane divided Dupont Boulevard . US 113 and DE 1 Bus. continue north for a short distance and end at which point the road merges onto northbound DE 1 at a partial interchange at the north end of Milford . 
