 The portion of DE 1 between Milford and Little Heaven was initially built as part of the DuPont Highway , a highway that spanned the state from Selbyville to Wilmington . The highway was proposed as a modern road that was part of a philanthropic measure . This roadway was planned to improve travel and bring economic development to Kent and Sussex counties . The DuPont Highway was to be modeled after the great boulevards of Europe and was to have a 200 @-@ foot ( 61 m ) wide right @-@ of @-@ way consisting of a 40 @-@ foot ( 12 m ) wide roadway for automobiles flanked by dual trolley lines , 30 @-@ foot ( 9 @.@ 1 m ) wide roadways for heavy vehicles , 15 @-@ foot ( 4 @.@ 6 m ) wide unpaved roadways for horses , and sidewalks . Utilities were to be buried underground below the horse roadways . The highway was also to include agricultural experimental stations and monuments for future surveying . Trolley revenues would help pay for the construction of the roadway . After portions of the DuPont Highway were built , these portions were planned to be turned over to the state at no charge . 
