U.S. Route 1 in Maryland / Drive from Arbutus, Baltimore County to Laurel, Prince George's County

U.S. Route 1 in Maryland Drive from Arbutus, Baltimore County to Laurel, Prince George's County U.S. Route 1 (US-1) is the easternmost and longest of the major north–south routes of the older 1920s era United States Numbered Highway System, running from Fort Kent, Maine to Key West, Florida. US-1 is paralleled by several major highways as it passes through Maryland, including Interstate 95 (I-95), the Baltimore–Washington Parkway, US-29, and US-301. Thus, US-1 has lost its significance as a long distance route through the state. It is often congested, however, because it remains a major route in the individual towns it traverses.