U.S. Federal Route 40 is an east-west highway across Southwestern Baltimore County. It runs from the Baltimore/Howard County Line, near Ellicott City, to the Baltimore County/City of Baltimore Line, near Cantonsville. U.S. Rt. 40 passes through the following town in Baltimore County. Cantonsville U.S. Rt. 40 is not multi-plexed in Baltimore County. U.S. Rt. 40 intersects the following highway in Baltimore County. Interstate 695, at Cantonsville.
