page_title: U.S. Route 1 in Maryland
section_title: Harford and Cecil counties
hierarchical_section_title: U.S. Route 1 in Maryland / Route description / Harford and Cecil counties
caption_attribution_description: English: This shows the signage on US-1 just north of the intersection with the southern terminus of US-222. Most motorists traveling south on US-222 to I-95 use either MD-222 or MD-161 to travel south to the interstate. However, both of these routes are narrow and winding, requiring an alternate route for trucks. MD-222 Truck and US-1 share a wrong way concurrency as the Truck route travels to MD-276 en route to I-95.
context_page_description: U.S. Route 1 is the easternmost and longest of the major north–south routes of the older 1920s era United States Numbered Highway System, running from Key West, Florida to Fort Kent, Maine. In the U.S. state of Maryland, an 80.86-mile segment of the route runs through central Maryland between Mount Rainier and Rising Sun.
  US 1 is paralleled by several major highways as it passes through Maryland, including Interstate 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.
context_section_description: US 1 heads northeast into Harford County, passing through a forested area and then the residential subdivisions of Pleasant Hills before reaching MD 152 (Mountain Road).  The highway continues east through a commercial strip toward the hamlet of Benson, where US 1 converges with MD 147 (Harford Road) at an acute angle.  US 1 Business heads east from the intersection toward Bel Air, while US 1 continues northeast on the Bel Air Bypass.  The bypass begins as a four-lane divided highway, but drops to a two-lane road before crossing Winters Run.  US 1 intersects Tollgate Road, gaining a lane northbound, before meeting MD 24 (Vietnam Veterans Memorial Highway) at a T-intersection with sweeping right-turn ramps.  MD 24 joins US 1 in a concurrency north on a four-lane undivided highway that passes under Vale Road.  MD 24 leaves US 1 at a partial cloverleaf interchange with Rock Spring Road, which heads south as MD 924 toward downtown Bel Air.  The bypass continues northeast with two lanes, its name changed to the Hickory Bypass before expanding to a four-lane divided highway and intersecting US 1 Business (Conowingo Road) south of Hickory.  US 1 intersects the eastern end of MD 23 (East–West Highway) and MD 543 (Ady Road) before reducing to a two-lane road and receiving the northern end of US 1 Business.
  US 1 continues northeast as Conowingo Road through farmland.  The old alignment of US 1, Forge Hill Road, splits to the east in Kalmia and rejoins the present highway 3 miles (4.8 km) later after separate crossings of Deer Creek.  The highway passes through a commercial strip around the intersection with MD 136 (Whiteford Road/Priestford Road) as US 1 passes to the south of Dublin.  US 1 curves east at the intersection with MD 440 (Dublin Road).  Smith Road, another old alignment of US 1, splits to the northeast as US 1 heads toward Darlington, where it meets MD 161 (Main Street) and MD 623 (Castleton Road).  The highway passes a weigh station on the southbound side that serves both directions and heads straight over a series of hills, gaining climbing lanes in either direction.  At Shuresville Road, US 1 curves to the northeast and crosses the Susquehanna River on top of Conowingo Dam, a hydroelectric dam owned by Exelon, into Cecil County.
  Immediately on the east side of the river, US 1 intersects the northern terminus of MD 222 (Susquehanna River Road) and passes over Norfolk Southern Railway's Port Road Branch.  The highway gains a climbing lane northbound as it ascends a hill to Conowingo, where the highway meets the southern terminus of US 222 (Rock Springs Road).  US 1 turns east and meets a pair of old alignments: Connelly Road heading northwest and MD 591 (Colora Road) heading southeast toward a removed bridge over Octoraro Creek.  After US 1 crosses the creek, the old alignment reconnects with the mainline as another segment of MD 591, Porters Bridge Road.  West of Rising Sun, MD 273 (Rising Sun Road) continues straight toward the town while US 1 curves northeast as the Rising Sun Bypass.  US 1 intersects the northern terminus of MD 276 (Jacob Tome Memorial Highway) and crosses Stone Run twice before turning north to the Pennsylvania state line.  The highway continues across the state line toward Oxford, Pennsylvania, becoming a four-lane divided highway just across the state line.
caption: US 1 northbound past US 222 in Conowingo
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