Interstate 66

Template:Infobox Interstate Interstate 66 (abbreviated 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 (Map); its eastern terminus is at Washington, D.C. at an intersection with U.S. Route 29. (Map)

Length


Miles	km	state
75	121	Virginia
2	3	District of Columbia

77	124	Total

Major cities

Bolded cities are officially-designated control cities for signs.

Intersections with other interstates

Interstate 81 in Middletown, Virginia
Interstate 495, the Capital Beltway at Falls Church, Virginia

Auxiliary routes

No auxiliary routes were constructed. Interstate 266 was planned in northern Virginia and Washington, D.C. It was cancelled in 1972 due to community opposition and environmental concerns.

Notes

I-66 at its western terminus, where it splits from I-81

Because I-66 is the only major 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 (through Arlington, Virginia), although many Arlington residents are adamantly opposed to this plan. Studies are being conducted by VDOT on the prospect of implementing this one-lane extension on westbound I-66 within the Beltway (thus alleviating congestion for people commuting away from DC).^[1]
Because of that heavy traffic, I-66 has HOV lanes.

- Between Route 234 in Manassas, Virginia and the Beltway, the left lane on eastbound I-66 is reserved for HOV-2 during morning rush hour, and the left lane on westbound I-66 is reserved for HOV-2 during evening rush hour. Also during those rush hours, between Route 50 and the Beltway, the right-hand shoulder is available for use as a travel lane. ^[2]

- Within the Beltway (between the Beltway and the Theodore Roosevelt Bridge), the entire eastbound (inbound) roadway is reserved for HOV-2 and Dulles Airport traffic during morning rush hour, and the entire westbound (outbound) roadway is reserved for HOV-2 and Dulles Airport traffic during evening rush hour. This is readily and easily enforced, since no single-passenger vehicles are allowed to come onto the highway at all within the beltway in the direction of rush-hour traffic. These restrictions may result more in a displacement of rush-hour than in an alleviation; I-66 is observed as relatively clear where and when they are in place, and congested for some time before and after.
This is the only 2 digit Interstate to enter the District of Columbia (other than the 100 yards (100 m) or so that I-95 passes through DC on the Woodrow Wilson Bridge). I-66 was planned to intersect I-95, before I-95 was rerouted to the east side of the Capital Beltway.
In 2005, as part of the reconstruction of the plaza in front of the John F. Kennedy Center for the Performing Arts, an entrance was opened from 25th Street, N.W., to westbound I-66.
Construction is nearly complete for the widening of I-66 for 3.8 miles on both Eastbound and Westbound routes between State Route 234 Business in Manassas and the Prince William Parkway (Route 234 Bypass), near the westernmost intersection with U.S. Route 29 in Gainesville.

Historical controversy

As with many urban interstate highway projects, I-66 has encountered opposition from local citizen groups. Most notably for I-66 was the construction through Arlington, Virginia, proposed in 1956. After the Virginia Department of Transportation (VDOT) (then known as the Virginia Department of Highways) acquired two sections of the former route of the Washington and Old Dominion Railroad to provide a right-of-way through Arlington for the new highway, the Arlington Coalition on Transportation (ACT) filed a lawsuit in Federal District Court in 1971 opposing the Arlington portion of the project. The group objected to that urban segment due to concerns over air quality, noise and community cohesion changes. In 1972 the U.S. Fourth Circuit Court of Appeals ruled in favor of ACT, technically blocking any construction. The U.S. Supreme Court upheld the ruling in favor of ACT later in 1972^[3]. The impasse was eventually broken when the parties agreed on experts to conduct air quality and noise studies for VDOT; the firm of ESL Inc., the expert hired originally by ACT, was agreed upon to be hired by VDOT. Then, U.S. Secretary of Transportation Coleman personally intervened in 1976 with negotiations to reach a compromise of a reduced highway width including a transit element.^[4]^[5]

Less controversial was the portion of the highway's route immediately west of Arlington. There, VDOT decided to curve the highway to bypass the City of Falls Church, increasing the interstate's length while sparing the city from the road's immediate environmental impacts.

Exit list

County	Municipality	Exit	Destination	Notes
Virginia
Frederick - Warren Boundary		1	Interstate 81 - Winchester, Roanoke
Warren	Front Royal	6	U.S. Route 340/U.S. Route 522 - Winchester, Front Royal
Warren		13	State Route 79 TO State Route 55 - Linden
Fauquier		18	State Route 688
		23	U.S. Route 17 North/State Route 55 West - Delaplane, Paris	US 17 and SR 55 join eastbound and leave westbound
	Marshall	27	State Route 55 East/State Route 647 - Marshall	SR 55 leaves eastbound and joins westbound
	Marshall	28	US 17 South - Warrenton, Fredericksburg	US 17 leaves eastbound and joins westbound
	The Plains	31	State Route 245 / Old Tavern Road
Prince William	Haymarket	40	U.S. Route 15 - Leesburg, Haymarket
		43	U.S. Route 29 - Gainesville, Charlottesville
		44	State Route 234 South (Prince William Parkway)	SR 234 joins eastbound and leaves westbound
		47	Route 234 North/State Route 234 Business (Sudley Road) - Manassas	SR 234 leaves eastbound and joins westbound
Fairfax		52	US 29 - Centreville
		53	State Route 28 (Sully Road) - Dulles Airport, Centreville
		55	State Route 7100 (Fairfax County Parkway) - Springfield, Reston, Herndon
		57	U.S. Route 50 - Winchester, Fairfax, Virginia, Fair Oaks
City of Fairfax		60	State Route 123 - Fairfax, Vienna
Fairfax	Vienna	62	State Route 243 (Nutley Street) - Fairfax, Vienna
		64	Interstate 495 (Capital Beltway) - Baltimore, Richmond	Left and right exits eastbound (left from HOV lane), No exit I-66 west to I-495 North
		66	State Route 7 (Leesburg Pike) - Falls Church
		67	State Route 267 to Dulles Toll Road to I-495 North - Dulles Airport	Westbound exit only
Arlington		68	Westmoreland Street	Eastbound exit only
		69	US 29 (Lee Highway)/State Route 237 (Washington Boulevard) Eastbound Sycamore Street (westbound)
		71	State Route 120 (Glebe Road)/State Route 237 (Fairfax Drive)	Eastbound exit only to Fairfax Drive
		72	US 29 (Lee Highway)/Spout Run Parkway	Eastbound exit only
		73	Rosslyn, Key Bridge ( US 29)
		75	State Route 110 South - Pentagon, Alexandria to I-395/US 1 - Pentagon City, Crystal City	Eastbound exit only
District of Columbia
			US 50 West / Arlington Boulevard / George Washington Memorial Parkway	westbound exit and eastbound entrance; US 50 joins eastbound and leaves westbound
			Independence Avenue
			US 50 East / Constitution Avenue / Downtown	eastbound exit and westbound entrance; US 50 joins westbound and leaves eastbound
			E Street Expressway
			Rock Creek Parkway	eastbound exit and westbound entrance
			Pennsylvania Avenue	eastbound exit and westbound entrance
			US 29 South / Whitehurst Freeway / Canal Road	eastbound exit and westbound entrance

References

^ Shaffer, Ron (October 21, 2005). "Dr. Gridlock". Washington Post.
^ "HOV Lanes - Northern Virginia HOV Operating Hours". VDOT Travel Center. Retrieved April 11. {{cite web}}: Check date values in: |accessdate= (help); Unknown parameter |accessyear= ignored (|access-date= suggested) (help)
^ Jay Mathews, High Court Backs Delay Of Rte. 66, The Washington Post, Times Herald, Washington, D.C., Nov 7, 1972
^ "An Abridged I-66 Chronology". The Arlington Coalition for Sensible Transportation. Retrieved February 5. {{cite web}}: Check date values in: |accessdate= (help); Unknown parameter |accessyear= ignored (|access-date= suggested) (help)
^ Hogan, C. M. and Harry Seidman, Air Quality and Acoustics Analysis of Proposed I-66 through Arlington, Virginia, ESL Inc. Technical Document T1026, Sunnyvale, Calif. (1971)

External links

HOV schedule in Northern Virginia, from Virginia Dept. of Transportation

[1] Shaffer, Ron (October 21, 2005). "Dr. Gridlock". Washington Post.

[2] "HOV Lanes - Northern Virginia HOV Operating Hours". VDOT Travel Center. Retrieved April 11. {{cite web}}: Check date values in: |accessdate= (help); Unknown parameter |accessyear= ignored (|access-date= suggested) (help)

[3] Jay Mathews, High Court Backs Delay Of Rte. 66, The Washington Post, Times Herald, Washington, D.C., Nov 7, 1972

[4] "An Abridged I-66 Chronology". The Arlington Coalition for Sensible Transportation. Retrieved February 5. {{cite web}}: Check date values in: |accessdate= (help); Unknown parameter |accessyear= ignored (|access-date= suggested) (help)

[5] Hogan, C. M. and Harry Seidman, Air Quality and Acoustics Analysis of Proposed I-66 through Arlington, Virginia, ESL Inc. Technical Document T1026, Sunnyvale, Calif. (1971)

[1]

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v t e Primary Interstate Highways
Signed	2 4 5 8 10 11 12 14 15 16 17 19 20 22 24 25 26 27 29 30 31 35 37 39 40 41 43 44 45 49 55 57 59 64 65 66 KS–KY VA–DC 68 69 70 71 72 73 74 75 76 CO–NE OH–NJ 77 78 79 80 81 82 WA–OR PA–NY CT–RI 83 84 OR–UT PA–MA 85 86 ID PA–NY CT–MA 87 NC NY 88 IL NY 89 90 91 93 94 95 96 97 99 H-1 H-2 H-3
Unsigned	A-1 A-2 A-3 A-4 PRI-1 PRI-2 PRI-3
Lists	Primary Auxiliary Suffixed Business Future
Other	Standards Gaps Tolled
Routes in italics are no longer a part of the system. Major Interstates are highlighted.