 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 landowers 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 . 
