 Delaware Route 20 ( DE 20 ) is an east – west highway in Sussex County , Delaware . Its western terminus is the Maryland state line in Reliance , where it continues as Maryland Route 392 ( MD 392 ) . Its eastern terminus is DE 54 west of Fenwick Island . The route runs through rural areas of Sussex County and passes through the towns of Seaford , Millsboro , and Dagsboro . DE 20 intersects U.S. Route 13 ( US 13 ) in Seaford , US 9 in Hardscrabble , US 113 and DE 24 / DE 30 in Millsboro , DE 26 in Dagsboro , and DE 17 in Roxana . DE 20 was originally created by 1936 to run from the Maryland border east to US 113 in Millsboro . By 1970 , it was realigned to bypass Seaford . The route was extended east to DE 1 in Fenwick Island by 1994 ; however , the eastern terminus was cut back to DE 54 in 2005 to avoid the concurrency with that route . 
