 By 1970 , the Norman Eskridge Highway was built between Front Street and US 13 in Seaford , and DE 20 was moved to its current alignment bypassing Seaford and Blades to the north and northeast along the Norman Eskridge Highway and US 13 . In 1985 , the highway was widened into a four @-@ lane road through Seaford , with a parallel bridge built over Conrail 's Delmarva Secondary ( now Norfolk Southern ) . The route was extended to DE 1 in Fenwick Island by 1994 , following its current alignment between Millsboro and DE 54 before overlapping with DE 54 ( Lighthouse Road ) for the easternmost portion of the route . In 2005 , DE 20 was removed from the DE 54 concurrency after it was determined unnecessary for there to be two route numbers for that stretch of road . 
