Maryland Route 147 (MD 147) is a state highway in the U.S. state of Maryland. Known as Harford Road, the state highway runs 18.82 miles (30.29 km) from U.S. Route 1 (US 1) and US 40 Truck in Baltimore north to US 1 and US 1 Business in Benson. MD 147 is an alternate route to US 1 between Baltimore and Bel Air, the county seat of Harford County. The state highway is the main street of several neighborhoods in Northeast Baltimore and the Baltimore County suburbs of Parkville and Carney. MD 147 is maintained by the Maryland State Highway Administration in Baltimore and Harford counties and by the Baltimore City Department of Transportation within the city. Harford Road was a pair of turnpikes before the Baltimore–Carney portion of the highway was designated one of the original state roads. Th