 The state highway was assigned in 2000 when US 113 was relocated as a four-lane divided highway through the area.As part of the overall project to expand US 113 to four lanes from Berlin to the Delaware state line, 14 unsigned auxiliary routes of MD 575 were designated on old alignments or service roads between 2002 and 2004.MD 575 begins at a right-in/right-out interchange with northbound US 113, also known as Worcester Highway, in Friendship.