Harford County Equestrian Center, Marywood housing development, Rock Spring Plaza
Opened in 1966, with U.S. Route 1 being rerouted from a path through downtown Bel Air to the bypass. U.S. Route 1's former alignment through Bel Air became U.S. Route 1 Business.
Continues north of Conowingo Road as the Hickory Bypass and south of Belair Road/Harford Road as the U.S. Route 1 section of Belair Road.
Aumar Village shopping center, Jones Junction car dealership complex, Country Life Farm, Harford Mall
Signed as U.S. Route 1 from North Avenue in Baltimore to an intersection with the Bel Air Bypass and Harford Road in Fallston, and U.S. Route 1 Business from the Bel Air Bypass/Harford Road intersection to Vietnam Veterans Memorial Highway in Bel Air. Northbound Belair Road travelers have to turn right at the Fallston intersection to stay on Belair Road, and southbound travelers have to turn left at the Fallston intersection to stay on Belair Road.
Continues north from Vietnam Veterans Memorial Highway as Baltimore Pike.
Hickory Plaza, Palmer State Park, Harley-Davidson Darlington motorcycle plant, Conowingo Dam
Signed as U.S. Route 1 Business from Moores Mill Road to the north end of the Hickory Bypass, and U.S. Route 1 from the Hickory Bypass to Ridge Road (in Pennsylvania, just across the Mason-Dixon Line).
Continues south from Moores Mill Road as Hickory Avenue.
Signed as Maryland Route 543 from Calvary Road to Riverside Parkway. Originally the entire road was part of Route 543, and it went all the way to Philadelphia Road, with a bridge over the John F. Kennedy Memorial Highway along the way. In 1988, Route 543 was rerouted onto the then-new Riverside Parkway as a result of the completion of an interchange for Route 543 on the JFK Highway. At the same time, the Creswell Road bridge over the JFK Highway was removed, making Creswell Road a discontinuous road with two dead-ending segments. The short segment south of the JFK Highway's right-of-way, which is only accessible from Philadelphia Road, is now known as Creswell Road South, and is now officially a separate road from Creswell Road.
Signed as Maryland Route 24 from Magnolia Road to the Tollgate Road/Vietnam Veterans Memorial Highway interchange in Abingdon and Maryland Route 924 from the Abingdon interchange to MacPhail Road. The entire length of Emmorton Road was part of Route 24 until 1987, when the Vietnam Veterans Memorial Highway, a divided highway parallel to Emmorton Road, opened to traffic. Route 24 was rerouted to that highway, resulting in the section of Emmorton Road north of Tollgate Road becoming designated as Route 924. The point at which Tollgate Road, Emmorton Road and the Vietnam Veterans highway meet was an at-grade intersection until 2011, when a freeway-type interchange opened in its place to relieve traffic congestion.
Continues north of MacPhail Road as South Main Street.
Conowingo Road to Conowingo Road (the bypass has a straight right-of-way, with Conowingo Road going around the bypass to the north in a 180 degree loop)
Opened in 2000, with U.S. Route 1 being rerouted onto the bypass, and U.S. Route 1 Business being extended along the former alignment of U.S. Route 1 through the Hickory area and up to the northern end of the bypass.
Continues north of the northern Conowingo Road intersection as the U.S. Route 1 section of Conowingo Road, and south of the southern Conowingo Road intersection as the Bel Air Bypass.
Jarrettsville United Methodist Church, Rigdon Farm, Cooptown Building, Forest Hill Maryland and Pennsylvania Railroad station building, Forest Hill Industrial Airpark, Saint Ignatius Church
The portion from Baldwin Mill Road/Federal Hill Road to Rocks Road is known as West Jarrettsville Road, and the portion from Rocks Road to Conowingo Road is known as East Jarrettsville Road.
Continues as Norrisville Road west of Baldwin Mill Road/Federal Hill Road.
