Maryland Route 100

Maryland Route 100

Paul T. Pitcher Memorial Highway

MD 100 is a major expressway in the southern suburbs of Baltimore, acting as a partial outer beltway. It runs from US 29 between Columbia and Ellicott City to MD 177 approaching Gibson Island.

MD 100 was constructed piecemeal over a 30 year period, originally opening from then-MD 3 (now I-97) to Mountain Road near MD 2 (Ritchie Hwy). By 1970, the entire section from MD 3 to MD 177 near Gibson Island was either under construction or opened. Another small section from I-95 to US 1 was opened around the mid-1970s, with the biggest sections of MD 100 being built between 1989 and 1998. MD 100 was officially completed and opened in full in late 1998.

MD 100 West	MD 100 East
MD 100 WB from MD 177 to I-97 [Exit 13] MD 100 WB from I-97 [Exit 13] to I-95 [Exit 5] MD 100 WB from I-95 [Exit 5] to US 29	MD 100 EB from US 29 to I-95 [Exit 5] MD 100 EB from I-95 [Exit 5] to I-97 [Exit 13] MD 100 EB from I-97 [Exit 13] to MD 177
Currently not available	Currently not available