 What is now DE 1 Bus. south of DE 36 and along North Walnut Street and US 113 was completed as a state highway by 1925 . In 1926 , suggestions were made to build a bypass east of Milford connecting DuPont Boulevard ( US 113 ) north of town to the state highway leading southeast to Rehoboth Beach in order to provide a better route to the beaches and reduce traffic congestion in Milford during the summer months . In 1928 , plans were made to build the bypass , which included a drawbridge over the Mispillion River . Construction on the drawbridge was underway in 1929 . The bypass to the east of Milford , along with the drawbridge , were completed in 1930 . When Delaware designated its state highways by 1936 , DE 14 was designated along Rehoboth Boulevard south of Northeast Front Street , where the route turned to the west . The divided Milford Bypass to the east of the city was completed in 1971 . In 1977 , DE 1 Bus. was designated onto its current alignment , running concurrent with DE 14 southeast of Northeast Front Street . The DE 14 concurrency was removed by 1984 when that route was realigned to follow Northeast Front Street to DE 1 . 
