Interstate 70 | ||||
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Map of western and central Maryland showing major roads with I-70 in red
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Route information | ||||
Maintained by MDSHA and Baltimore DOT | ||||
Length: | 93.62 mi (150.67 km) | |||
Existed: | 1962 – present | |||
Tourist routes: |
Historic National Road Chesapeake and Ohio Canal Scenic Byway |
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Major junctions | ||||
West end: | I-70 / US 522 at Pennsylvania border near Hancock | |||
I-68 / US 40 near Hancock |
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East end: | Park and Ride in Baltimore | |||
Location | ||||
Counties: | Washington, Frederick, Carroll, Howard, Baltimore, City of Baltimore | |||
Highway system | ||||
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Interstate 70N | |
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Location: | Frederick–Baltimore |
Existed: | 1966–1974 |
Interstate 270 | |
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Location: | Bethesda–Frederick |
Length: | 34.70 mi (55.84 km) |
Existed: | 1975–present |
Interstate 370 | |
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Location: | Gaithersburg |
Length: | 2.54 mi (4.09 km) |
Existed: | 1988–present |
I-68 / US 40 near Hancock
US 522 in Hancock
I-81 near Hagerstown
US 15 / US 340 in Frederick
I-270 / US 40 in Frederick
US 40 near West Friendship
US 29 in Ellicott City