 The route was widened into a divided highway between DE 18 ( now US 9 ) in Nassau and Rehoboth Beach in 1954 in order to provide relief to traffic heading to the beaches . Channelized intersections were built at DE 18 and the entrance to Rehoboth Beach . As part of this widening , DE 14 was moved to a new alignment to bypass <unk> Corner , removing a concurrency with DE 18 ( now US 9 Bus . ) . In 1965 , a new dual bridge was constructed across the Indian River Inlet . By 1966 , DE 14A was designated onto the former alignment of DE 14 through Rehoboth Beach . The divided highway portion of DE 14 was extended north to DE 16 , which included a bypass of Nassau , and between the Indian River Inlet and South Bethany in 1967 . By 1967 , a divided bypass of Milford running from DE 14 southeast of Milford to US 113 north of Milford was under proposal . Structural design on the Milford Bypass began in 1968 . In 1969 , design work began on widening DE 14 into a divided highway between DE 16 and the Milford Bypass . The route was widened into a divided highway between Dewey Beach and the Indian River Inlet the same year . In 1971 , the divided <unk> Bypass between DE 14 southeast of Milford and US 113 north of Milford was completed . In 1971 , a contract was awarded to widen DE 14 to a divided highway between Fenwick Island and South Bethany . This widening project was completed a year later . In 1973 , construction was underway to make DE 14 a divided highway from the Milford Bypass to DE 16 , which included a bypass of Argos Corner ; this was completed in 1974 . 
