Location: Bel Air Byp and Conowingo Rd, Harford Cty After the 24 junction, we’re a quarter mile from US 1 Business, which connects to MD 23. Location: Bel Air Byp and Conowingo Rd, Harford Cty Turn left to follow 1 Business north to MD 23. Location: Bel Air Byp and Conowingo Rd, Harford Cty Conowingo … Continue reading U.S. Route 1, MD-24/MD-924 to US-1 Bus