Maryland State Route 139 is an east-west highway in Southwestern Baltimore County. It runs from the City of Baltimore/Baltimore County Line, near Arbutus, to Maryland State Route 166, near Arbutus. MD St Rt 372 passes through the following town in Baltimore County. Cantonville Arbustus MD St Rt 372 is not multi-plexed in Baltimore County. MD St Rt 372 intersects the following highways in Baltimore County. Interstate 695, near Arbutus. Maryland State Route 166, near Arbutus.