Editing Interstate 66 (section)

== Exit list ==
All exits in the District of Columbia are unnumbered.{{jcttop|old|state_col=State/district|length_ref=<ref name="google maps dc">{{Google maps |url=https://www.google.com/maps/dir/38.8917014,-77.0647933/38.9026691,-77.0587194/@38.8974869,-77.0631526,16z/am=t/data=!3m1!4b1!4m2!4m1!3e0 |access-date=January 31, 2020}}</ref>}}
{{VAint|old
|sspan=49
|county=Frederick
|location=none
|mile=0.00
|exit=1
|old=
|road={{Jct|state=VA|I|81|city1=Roanoke|city2=Winchester}}
|notes=Western terminus; signed as exits 1A (south) and 1B (north); exit 300 on I-81; [[directional T interchange|tri-stack interchange]]
}}
{{VAint|old
|county=Warren
|cspan=2
|location=Front Royal
|mile=6.4
|exit=6
|old=2
|road={{Jct|state=VA|US|340|US|522|city1=Winchester|city2=Front Royal}}
}}
{{VAint|old
|location=none
|mile=12.9
|exit=13
|old=3
|road={{Jct|state=VA|SR|79|to2=to|SR|55|city1=Linden|city2=Front Royal}}
}}
{{VAint|old
|county=Fauquier
|cspan=5
|location=Markham
|ctdab=Fauquier
|mile=18.5
|exit=18
|old=4
|road={{jct|state=VA|Sec|688|county1=Fauquier|location1=[[Markham, Fauquier County, Virginia|Markham]]}}
}}
{{VAint|old
|location=Delaplane
|mile=23.3
|exit=23
|old=5
|type=concur
|road={{Jct|state=VA|US|17|dir1=north|SR|55|dir2=west|Sec|731|county3=Fauquier|city1=Delaplane|city2=Paris}}
|notes=Western terminus of US&nbsp;17 / SR&nbsp;55 [[concurrency (road)|concurrency]]
}}
{{VAint|old
|location=none
|mile=27.0
|exit=27
|old=6
|type=concur
|road={{jct|state=VA|SR|55|dir1=east|name1=[[U.S. Route 17 Business (Marshall, Virginia)|US 17 Bus.]] south|Sec|647|county2=Fauquier|city1=Marshall}}
|notes=Eastern terminus of SR&nbsp;55 concurrency; former [[Virginia State Route 242 (1933–1948)|SR&nbsp;242]] south
}}
{{VAint|old
|location=none
|mile=28.3
|exit=28
|old=7
|type=concur
|road={{Jct|state=VA|US|17|dir1=south|US-Bus|17|dab2=Marshall|dir2=north|city1=Marshall|city2=Warrenton|city3=Fredericksburg}}
|notes=Eastern terminus of US&nbsp;17 concurrency
}}
{{VAint|old
|location=none
|mile=31.3
|exit=31
|old=8
|road={{Jct|state=VA|SR|245|city1=The Plains|city2=Old Tavern}}
}}
{{VAint|old
|county=Prince William
|cspan=9
|location=Haymarket
|mile=40.5
|exit=40
|old=9
|road={{Jct|state=VA|US|15|city1=Haymarket|city2=Leesburg}}
|notes=[[Diverging diamond interchange]]
}}{{VAint|old|location=none|mile=|type=hov|road={{jct|state=VA|I-Express|66|dir1=east}}|notes=Western terminus of HOV3+/toll lanes|exit=♦}}
{{VAint|old
|location=Gainesville
|mile=43.1
|exit=43
|old=10
|road={{Jct|state=VA|US|29|city1=Gainesville|city2=Warrenton}}
|notes=Signed as exits 43A (south) and 43B (north)
|lspan=2}}{{VAint|old|road=University Boulevard to {{Jct|state=VA|US|29}}|type=hov|notes=Westbound exit and eastbound entrance from HOV3+/toll lanes|mile=|exit=♦}}
{{VAint|old
|location=none
|mile=44.5
|exit=44
|old=11
|type=concur
|road={{Jct|state=VA|SR|234|dir1=south|name1=[[Prince William Parkway]]|city1=Manassas|city2=Dumfries}}
|notes=Western terminus of SR&nbsp;234 concurrency
|lspan=2}}{{VAint|old|road={{jctname|state=VA|Sec|621|county1=Prince William|name1=Balls Ford Road}}|type=hov|notes=Westbound exit and eastbound entrance from HOV3+/toll lanes|mile=|exit=♦}}
{{VAint|old
|location=none
|mile=47.3
|exit=47
|old=12
|type=concur
|road={{Jct|state=VA|SR|234|dir1=north|SR-Bus|234|dab2=Manassas|dir2=south|city1=Manassas|location2=[[Manassas National Battlefield Park]]}}
|notes=Eastern terminus of SR&nbsp;234 concurrency; signed as exits 47A (south) and 47B (north) westbound
|lspan=2}}{{VAint|old|road={{Jct|state=VA|SR|234|dir1=north|SR-Bus|234|dab2=Manassas|dir2=south}}|notes=Eastbound entrance to HOV3+/toll lanes|type=hov|mile=|exit=♦}}
{{VAint|old
|county= 
|location=none
|mile=48.8
|place=[[Rest area]]
}}
{{VAint|old
|county=Fairfax
|cspan=23
|location=Centreville
|mile=52.1
|exit=52
|old=13
|road={{Jct|state=VA|US|29|to2=to|SR|28|dir2=south|city1=Centreville}}
}}
{{VAint|old
|location1=Centreville
|location2=Chantilly
|lspan=3
|mile=53.2
|mspan=2
|exit=53B
|old=14
|ospan=2
|type=incomplete
|road={{Jct|state=VA|SR|28|dir1=north|extra=airport|location1=[[Dulles International Airport]]}}
|notes=Signed as exit 53 eastbound; no westbound entrance. Direct access to SR 620 (Braddock Rd), and SR 657 (Walney Rd); westbound entrance from SR 620
}}
{{VAint|exit
|mile=none
|exit=53A
|type=incomplete
|road={{jct|state=VA|SR|28|dir1=south|city1=Centreville}}
|notes=Westbound exit and eastbound entrance
}}{{VAint|old|road={{Jct|state=VA|SR|28|dir1=north|extra=airport|location1=[[Dulles International Airport]]}}|notes=Access from HOV3+/toll lanes|type=hov|exit=|mile=}}
{{VAint|old
|location=Fair Lakes
|lspan=2
|mile=54.9
|type=hov
|exit=♦
|road={{jctname|state=VA|Sec|645|county1=Fairfax|name1=Stringfellow Road|noshield1=yes}}
|notes=Westbound exit and eastbound entrance from HOV3+/toll lanes
}}
{{VAint|old
|mile=55.9
|exit=55
|old=15
|road={{Jct|state=VA|SR|286|name1=Fairfax County Parkway|city1=Springfield|city2=Reston|city3=Herndon}}
|notes=Signed as exits 55A (south) and 55B (north)
}}
{{VAint|old
|location=Fair Oaks
|ctdab=Fairfax
|lspan=3
|mile=57.1
|exit=♦
|type=hov
|road={{jctname|state=VA|Sec|6751|name1=Monument Drive|noshield1=yes}}
|notes=Access from HOV3+/toll lanes
}}
{{VAint|old
|mile=58.1
|exit=57
|old=16
|road={{Jct|state=VA|US|50|city1=Fair Oaks|countydab1=Fairfax|city2=Fairfax}}
|notes=Signed as exits 57A (east) and 57B (west)
|mspan=2}}{{VAint|road={{Jct|state=VA|US|50|dir1=west|city1=Fair Oaks|countydab1=Fairfax}}|notes=Westbound exit and eastbound entrance from HOV3+/toll lanes|type=hov|exit=♦|location=|miles=}}
{{VAint|old
|location=Oakton
|lspan=4
|mile=60.1
|old=17
|exit=60
|road={{Jct|state=VA|SR|123|city1=Fairfax|city2=Vienna}}
|mspan=2}}{{VAint|road={{Jct|state=VA|SR|123|city1=Fairfax|city2=Vienna}}|notes=Access via HOV3+/toll lanes|type=hov|exit=♦|mile=|location=}}{{VAint|old|type=hov|road=Vaden Drive - {{jct|extra=rail}} [[Vienna station (Washington Metro)|Vienna/Fairfax-GMU Station]]|notes=Eastbound exit and westbound entrance from HOV3+/toll lanes|exit=♦|mile=}}
{{VAint|old
|ospan=2
|espan=2
|mile=61.6
|old=17A
|exit=62
|road={{jct|extra=rail}} [[Vienna station (Washington Metro)|Vienna/Fairfax-GMU Station]]
|notes=Accessible via [[collector–distributor road|C/D lanes]].
Signed as 62A (Vienna/Fairfax - GMU) and 62B (Nutley Street) in the westbound direction
|nspan=2
}}
{{VAint
|location1=Oakton
|location2=Merrifield
|mile=62.5
|road={{Jct|state=VA|SR|243|name1=Nutley Street|city1=Vienna|city2=Fairfax}}
|notes=none}}
{{VAint|old
|location1=Dunn Loring
|location2=Merrifield
|location3=Idylwood
|lspan=4
|mile=65.1
|mspan=4
|exit=64A
|old=18
|ospan=2
|road={{jct|state=VA|I|495|dir1=south|city1=Richmond|city2=Alexandria}}
|notes=Signed as exit 64 westbound; exit 49 on I-495
}}
{{VAint|exit
|mile=none
|exit=64B
|type=incomplete
|road={{Jct|state=VA|I|495|dir1=north|city1=Tysons Corner|location2=[[Baltimore]]}}
|notes=Eastbound exit and westbound entrance; exit 49 on I-495
}}
{{VAint|old
|type=etc
|mile=none
|exit=—
|road={{jct|state=VA|I-Express|495|city1=Richmond|location2=[[Baltimore]]}}
|notes=Eastbound exit and westbound entrance
}}{{VAint|old|road={{jct|state=VA|I|495|I-Express|495|city1=Tysons Corner|location2=[[Baltimore]]|city3=Richmond|city4=Alexandria}}|notes=Eastbound exit and westbound entrance from HOV3+/toll lanes only|type=hov|mile=none|exit=♦}}
{{VAint|old|location=Idylwood|lspan=2|type=hov|road={{jct|state=VA|I-Express|66|dir1=west}}|notes=Eastern terminus of HOV3+/toll lanes|mile=|exit=♦}}{{jctplace|old
|mile=
|type=etc
|place=Toll gantry (non-HOV3+ vehicles, peak-direction only)<ref name=express-lanes/>
}}
{{VAint|old
|location1=Pimmit Hills
|location2=Idylwood
|lspan=2
|mile=66.0
|exit=66
|old=19
|road={{Jct|state=VA|SR|7|name1=Leesburg Pike|city1=Tysons Corner|city2=Falls Church}}
|notes=Signed as exits 66A (east) and 66B (west) westbound; serves [[West Falls Church station]]
}}
{{VAint|old
|mile=66.6
|exit=67
|old=20
|type=incomplete
|road={{Jct|state=VA|SR|267|dir1=west|to2=to|I|495|dir2=north|location1=[[Dulles International Airport]]|location2=[[Baltimore]]}}
|notes=Westbound exit and eastbound entrance; eastern terminus of SR 267
}}
{{jctplace|old
|state=VA
|location=Westhampton
|mile=
|type=etc
|place=Toll gantry (non-HOV3+ vehicles, peak-direction only)<ref name=express-lanes/>
}}
{{VAint|old
|county=Arlington
|cspan=9
|location=East Falls Church
|lspan=3
|mile=67.8
|exit=68
|old=21
|type=incomplete
|road=Westmoreland Street
|notes=Eastbound exit only
}}
{{VAint|old
|type=incomplete
|mile=68.4
|exit=69
|old=22
|road={{Jct|state=VA|US|29|SR|237|name2=[[Washington Boulevard (Arlington)|Washington Boulevard]] / [[Lee Highway]]}}
|notes=Eastbound exit and westbound entrance; serves [[East Falls Church station]]
}}
{{VAint|old
|type=incomplete
|mile=
|exit=69
|old=23
|road={{jct|state=VA|road|Sycamore Street|city1=Falls Church}}
|notes=Westbound exit and eastbound entrance; serves [[East Falls Church station]]
}}
{{jctplace|old
|state=VA
|location=Bluemont
|ctdab=Arlington County
|mile=
|type=etc
|place=Toll gantry (non-HOV3+ vehicles, peak-direction only)<ref name=express-lanes/>
}}
{{VAint|old
|location=Ballston
|mile=70.5
|exit=71
|old=24
|road={{Jct|state=VA|SR|120|name1=Glebe Road|SR|237|name2=Fairfax Drive}}
|notes=Serves [[Ballston–MU station]]
}}
{{jctplace|old
|state=VA
|location=Cherrydale
|mile=
|type=etc
|place=Toll gantry (non-HOV3+ vehicles, peak-direction only)<ref name=express-lanes/>
}}
{{VAint|old
|location=Maywood
|mile=72.1
|exit=72
|old=25
|type=incomplete
|road={{Jct|state=VA|US|29|name1=[[Lee Highway]]|road|[[Spout Run Parkway]]}}
|notes=Eastbound exit and westbound entrance
}}
{{VAint|old
|location=Rosslyn
|lspan=2
|mile=73.1
|exit=73
|old=26
|road={{Jct|state=VA|US|29|name1=[[Lee Highway]]|city1=Rosslyn|location2=[[Key Bridge (Washington, D.C.)|Key Bridge]]}}
}}
{{VAint|old
|mile=74.2
|exit=75
|old=27
|type=incomplete
|road={{Jct|state=VA|SR|110|dir1=south|location1=[[The Pentagon|Pentagon]]|city2=Alexandria}}
|notes=Eastbound exit and westbound entrance
}}
{{jctbridge|old
|state_special=[[Virginia]]–[[District of Columbia|D.C.]] line
|sspan=2
|river=[[Arlington County, Virginia|Arlington]]–[[Washington, D.C.]] line
|lspan=2
|mile=74.8
|mile2=0.0
|line=yes
|place=[[Theodore Roosevelt Bridge]] over the [[Potomac River]]
}}
{{DCint|old
|mile=0.1
|exit=—
|type=concur
|road={{jct|state=VA|US|50|dir1=west|name1=[[Arlington Boulevard]]|GWMP||dir2=north}}
|notes=Western terminus of US&nbsp;50 concurrency; westbound exit and eastbound entrance
}}
{{DCint|old
|sspan=8
|county_special=[[Washington, D.C.|Washington]]
|cspan=8
|location=Foggy Bottom
|lspan=7
|type=incomplete
|mile=0.5
|mspan=2
|exit=—
|road=[[Independence Avenue (Washington, D.C.)|Independence Avenue]]
|notes=Eastbound exit only
}}
{{DCint|old
|mile=none
|exit=—
|type=concur
|road={{Jct|state=DC|US|50|dir1=east|name1=[[Constitution Avenue]]|city1=Downtown}}
|notes=Eastern terminus of US&nbsp;50 concurrency; eastbound exit and westbound entrance
}}
{{DCint|old
|mile=0.7
|exit=—
|road=[[E Street Expressway]] east
|notes=Western terminus of the E Street Expressway
}}
{{DCint|old
|type=incomplete
|mile=0.8
|exit=—
|road=[[Kennedy Center]]
|notes=Westbound entrance only
}}
{{DCint|old
|mile=0.9
|exit=—
|type=incomplete
|road=[[Independence Avenue (Washington, D.C.)|Independence Avenue]] / [[Maine Avenue]]
|notes=Westbound exit and eastbound entrance
}}
{{DCint|old
|mile=1.2
|exit=—
|type=incomplete
|road=[[Rock Creek Parkway]]
|notes=Eastbound exit and westbound entrance
}}
{{DCint|old
|mile=1.4
|exit=—
|type=incomplete
|road=[[Pennsylvania Avenue]]
|notes=Eastbound exit only
}}
{{DCint|old
|location1=Foggy Bottom
|location2=Georgetown
|mile=1.6
|exit=—
|road={{jctname|state=DC|US|29|dir1=south|name1=[[Whitehurst Freeway]]|noshield1=yes}} to [[Canal Road (Washington, D.C.)|Canal Road]]
|notes=Eastern terminus
}}
{{jctbtm|col=9|keys=concur,etc,hov,incomplete}}