Interstate 66

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Interstate 66 marker

Main route of the Interstate Highway System
Main • Auxiliary • Business

Interstate 66 (I-66) is an Interstate Highway in the eastern United States. As indicated by its even route number, it runs in an east–west direction. Its western terminus is at Middletown, Virginia, at an intersection with Interstate 81;[2] its eastern terminus is in Washington, D.C., at an intersection with U.S. Route 29.[3] Interstate 66 has no physical or historical connection to U.S. Route 66.

The E Street Expressway is a spur from Interstate 66 into the Foggy Bottom neighborhood of Washington, D.C.

Contents

Route description

Virginia

Because I-66 is the only Interstate Highway running west from Washington, D.C., into Northern Virginia, traffic on the road is often extremely heavy. For decades, there has been talk of widening I-66 from 2 to 3 lanes each way inside the Capital Beltway (Interstate 495) through Arlington, Virginia, although many Arlington residents are adamantly opposed to this plan. The Virginia Department of Transportation (VDOT) is studying the prospect of implementing this one-lane-plus-shoulder extension on westbound I-66 within the Beltway (in an attempt to reduce congestion for people commuting away from D.C.).[4]

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