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Highways - Washington County
Traffic Conditions and Road Closures - MDOT SHA
CHART - Live Cameras - Maryland
U.S. Route 40 Alternate (Hagerstown–Frederick, Maryland)
Maryland Route 64 - Wikipedia
The Historic National Road: America's First Highway - Visit Maryland
Hagerstown, MD Traffic and Road Conditions - LocalConditions.com
Maryland Highways - Maryland State Archives
Maryland's Scenic Byways | VisitMaryland.org
The future is near for self-driving trucks on US roads | AP News