 In 1911 , the Coleman DuPont Road , Inc. was established and construction on the highway began . By 1912 , construction was interrupted by litigation challenging both the constitutionality of the law establishing the road building corporation and the need for DuPont to acquire such a large right @-@ of @-@ way . DuPont would narrow the proposed right @-@ of @-@ way to 100 feet ( 30 m ) in order to compromise with opponents of the highway in addition to offering <unk> whose properties were affected by the highway five times the assessed value of the land five years after the highway was completed . The DuPont Highway would end up being built on a 60 @-@ foot ( 18 m ) alignment with a 32 @-@ foot ( 9 @.@ 8 m ) wide roadway . The DuPont Highway north of Milford would be both designed and constructed by Delaware State Highway Department ( DSHD ) . A portion of the road north of Milford and from Frederica to Little Heaven were completed by 1920 . The portion of the DuPont Highway from north of Milford to Frederica was under construction in 1920 and completed by 1923 , the same year the last section of the entire Selbyville – Wilmington highway was completed near Odessa . When the U.S. Highway System was designated in 1926 , this portion of the DuPont Highway became a part of US 113 . 
