INTERSTATE 66

• Number of Miles- 77
  • Virginia- 75 miles
  • District of Columbia- 2 miles
• Eastern End- Washington, DC at US 29
• Western End- Middletown, VA at I-81
• Major Cities Along the Route-
  • Washington, DC
• Intersections with other Interstates
  • I-81 in Middletown, VA
• Spur Routes- None

  Notes

  This is the only 2 digit Interstate to enter DC (unless you count the 100 yards or so that I-95 crosses over the DC section of the Potomac). I-66 used to intersect I-95, before they rerouted it to be the east side of the Capitol Beltway.

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