U.S. Route 40 | ||||
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Route information | ||||
Maintained by MDSHA, Baltimore DOT, and MDTA | ||||
Length | 221.31 mi (356.16 km) | |||
Existed | 1926 – present | |||
Tourist routes |
Historic National Road Journey Through Hallowed Ground Byway Chesapeake and Ohio Canal Scenic Byway Antietam Campaign Scenic Byway |
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Major junctions | ||||
West end | US 40 at Pennsylvania border near Keyser's Ridge | |||
I-68 / US 219 near Grantsville |
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East end | US 40 at Delaware border in Elkton | |||
Location | ||||
Counties | Garrett, Allegany, Washington, Frederick, Carroll, Howard, Baltimore, City of Baltimore, Harford, Cecil | |||
Highway system | ||||
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I-68 / US 219 near Grantsville
US 220 in Cumberland
I-70 / US 522 in Hancock
I-81 near Hagerstown
US 15 / US 340 in Frederick
I-70 / I-270 in Frederick
US 29 near Ellicott City
I-695 in Catonsville
US 1 in Baltimore