Portal:Maryland roads/Did you know/9

• ...that in 1821, the Maryland General Assembly conscripted several banks to fund the construction of a turnpike between Boonsboro and Hagerstown along what is now U.S. Route 40 Alternate between Hagerstown and Frederick?
• ...that the former Interstate 170 in Baltimore was proposed to connect to Interstate 95 and be renumbered Interstate 595?
• ...that what is now Maryland Route 150 was originally an oyster shell road connecting Highlandtown to Chase?