Location: Conowingo Rd and Dublin Rd, Harford Cty Shortly after MD 136, we’ll approach MD 440. Location: Conowingo Rd and Dublin Rd, Harford Cty Turn left ahead for MD 440. Location: Conowingo Rd and Dublin Rd, Harford Cty Turn left for 440 west.  N to MD-161, S to US-1 Bus  W to MD-136  N to … Continue reading U.S. Route 1, MD-136 to MD-440