Interstate 70 in Maryland
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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
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 I-695 in Woodlawn
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| East end: |
 Park and Ride in Baltimore
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| Location | ||||
| Counties: | Washington, Frederick, Carroll, Howard, Baltimore, City of Baltimore | |||
| Highway system | ||||
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| Location: | Frederick–Baltimore |
| Existed: | 1966–1974 |
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| Location: | Bethesda–Frederick |
| Length: | 34.70 mi (55.84 km) |
| Existed: | 1975–present |
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| Location: | Gaithersburg |
| Length: | 2.54 mi (4.09 km) |
| Existed: | 1988–present |
I-68 / US 40 near HancockUS 522 in Hancock
I-81 near Hagerstown
US 15 / US 340 in Frederick
I-270 / US 40 in FrederickUS 40 near West Friendship
US 29 in Ellicott City
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