| Route information | ||||
|---|---|---|---|---|
| Maintained byVDOT | ||||
| Length | 49 mi[1][unreliable source] (79 km) | |||
| Existed | 1918–present | |||
| Major junctions | ||||
| South end | ||||
| Major intersections | ||||
| North end | ||||
| Location | ||||
| Country | United States | |||
| State | Virginia | |||
| Counties | Fauquier,Prince William,City of Manassas,City of Manassas Park,Fairfax,Loudoun | |||
| Highway system | ||||
| ||||
State Route 28 (SR 28) is a primarystate highway in theU.S. state ofVirginia that traverses the counties ofLoudoun,Fairfax,Prince William, andFauquier. The route is a major artery in theNorthern Virginia region, serving as an important two-lane highway in rural Fauquier and Prince William Counties, the main thoroughfare through Manassas and Manassas Park, and a high-capacity freeway through Fairfax and Loudoun counties.
From SR 28's southern terminus toNokesville, it is a two-lane rural highway, calledCatlett Road through Fauquier County andNokesville Road in Prince William County where it becomes a four-lane divided highway up toManassas. Through downtown Manassas, the route follows one-way streets, with VA 28 westbound followingChurch Street and eastbound followingCenter Street andZebedee Street. From thereon toCentreville in Fairfax County, the road is calledCentreville Road. Between Fairfax and Loudoun Counties up to its northern terminus, VA 28 is a six-lane freeway calledSully Road.

Route 28 starts as Catlett Road at busyUS 29/US 15 in Fauquier County just north ofCulpeper County, and intersectsUS 17 about 3 miles (4.8 km) from its beginning. It is two lanes throughout rural Fauquier County with a speed limit of 45 miles per hour (72 km/h) and passes by farms and agricultural areas. Most of the way through Fauquier County Route 28 runs parallel toNorfolk Southern railroad tracks in order to serve the towns that are placed along them. Several historical markers can be seen along Route 28 as it passes through Fauquier including Supreme Court JusticeJohn Marshall's birthplace and the raid on Catlett Station. For many years the old bridge for Route 28 could be seen just outsideCatlett. Historically, the Catlett Fire Department Parade would close Route 28 for several hours each spring, however, this practice was discontinued as traffic became heavier in the 1990s.
Upon entering Prince William County atNokesville, SR 28 changes its name to Nokesville Road. At Nokesville, it expands from two to four lanes before reachingSR 215 at Fitzwater Drive (SR 652). Further north, it reaches its first grade-separatedinterchange atSR 234/Prince William Parkway, south of the City ofManassas.
The next interchange is atWellington Road in Manassas, mostly tograde-separate the crossing of SR 28 with nearby railroad tracks. This interchange was built as an $18.3 million project and certified under theAmerican Recovery and Reinvestment Act of 2009 on October 5, 2009. The contract for construction of this interchange was awarded on July 14, 2010.[2]
SR 28 is a main thoroughfare through Manassas, and separates into aone-way pair of Church and Center Streets in front of aConfederatecemetery. The split routes run through the center of the city and rejoin several blocks later, merging into Centreville Road. The road passes briefly throughManassas Park and then passes throughYorkshire as SR 28 leaves Prince William County where crossingBull Run intoCentreville, Fairfax County.
VA 28/Centreville Road enters Fairfax County atCentreville, at which point it transitions from anundivided to adivided highway. It starts as a suburban arterial with only at-grade intersections, widening to six lanes at an intersection with Machen Road on the south side of Centreville. In the middle of Centreville, VA 28 transitions into Sully Road and becomes a fully controlled-accessfreeway, where it crossesU.S. Route 29 at apartial cloverleaf interchange andInterstate 66 at asystem interchange with flyovers. Up until 2020, the section of VA 28 between Centreville and Chantilly had signalized intersections at I 66,Braddock Road (SR 620), andEllanor C. Lawrence Park and was only built toexpressway standards. The intersections of since been replaced by overpasses and flyovers as part of theTransform 66 project, which included several improvements to the I 66 corridor through the late 2010s and early 2020s.

After acloverleaf interchange withWestfields Boulevard (SR 662), Route 28 entersChantilly. The highway travels through asingle-point urban interchange with Willard Road and continues through Chantilly. Route 28 then entersOak Hill and heads north along the eastern edge of theWashington Dulles International Airport. The next interchanges are forUS 50 in Chantilly, theSteven F. Udvar-Hazy Center (an annex of theNational Air and Space Museum), McLearen Road, and Frying Pan Road on the south end ofHerndon. The road then exits into Loudoun County.

The first interchange in Loudoun County is at the entrance toDulles Airport, with access to the airport itself, to the Dulles Toll/Access Road (State Route 267) and Dulles Greenway, and to Innovation Avenue (State Route 209). Continuing north through Loudoun County, Route 28 has interchanges with Old Ox Road and Sterling Boulevard, the former also servicing Herndon. The next interchange is an elaborate interchange with Route 625, Waxpool Road and Church Road, which lead intoAshburn andSterling, respectively. This interchange features two exits for Waxpool Road from the northbound lanes of Route 28: a left flyover and right loop ramp.
Heading north, Route 28 passes through the industrial and commercial areas ofDulles. It is still known as Sully Road through this stretch, although within Loudoun County it is co-designated asDarrell Green Boulevard, after the formerWashington Commanders Hall of Famer (the team's official headquarters is in Ashburn), whose uniform number was 28.[3] A northbound-only, exit-only ramp atWarp Drive is followed by apartial cloverleaf serving Gloucester Parkway and Nokes Boulevard. This interchange leads to both Ashburn and theDulles Town Center shopping mall. Route 28 ends atVA 7 in Sterling in a completedirectional T interchange.
SR 28 is one of two routes to survive from the 1918 inception of Virginia's state route system without being completely decommissioned or renumbered, the other beingSR 10. However, due to extensions, truncations, and partial renumberings, the current SR 28 contains no portion of the earliest routing, which ran near present-dayU.S. 29 fromLovingston inNelson County toCharlottesville.[1]
In 1987, Virginia authorized the creation of special tax districts. Fairfax and Loudoun Counties quickly formed the firsttransportation improvement district in the Commonwealth, by imposing a 20 cent per $100 real estate surcharge on commercial and industrial property located near Route 28. The surcharge financed bonds to pay for improvements to Route 28. From 1988 to 1991, 14 miles (23 km) of Route 28 were widened from two lanes to six lanes and interchanges were built at US 50, VA 7 and VA 267.[4]

The completion schedule for each funded interchange and roadway is as follows:
VA 28 was widened to four lanes southbound between Waxpool Road and Innovation Avenue in January 2017, and northbound between McLearen Road and VA 267 in June 2017.[9] For a decade there have also been proposals to extend Route 28 to north to connect it withInterstate 370 inGaithersburg, Maryland over aTechway Bridge across thePotomac River.[10] TheLoudoun County Board of Supervisors most recently endorsed the bridge at a summer 2017 transportation summit, althoughMontgomery County, Maryland remains adamantly opposed to the project.[11]
All exits are unnumbered.
| County | Location | mi[12] | km | Destinations | Notes |
|---|---|---|---|---|---|
| Fauquier | Remington | 0.00 | 0.00 | Southern terminus | |
| Bealeton | 2.30 | 3.70 | |||
| Prince William | Bristow | 18.84 | 30.32 | ||
| 18.96 | 30.51 | ||||
| City ofManassas | 20.36 | 32.77 | Partial cloverleaf interchange with flyover ramps | ||
| 23.23 | 37.39 | ||||
| City ofManassas Park | 24.89 | 40.06 | |||
| Fairfax | Centreville | 29.65 | 47.72 | South end of freeway section | |
| Partial cloverleaf interchange | |||||
| 30.19 | 48.59 | I-66 exit 53; no direct access from SR 28 north to I-66 west or I-66 east to SR 28 south | |||
| 30.50 | 49.08 | Braddock Road/Walney Road | Northbound exit and southbound entrance | ||
| Chantilly | 32.26 | 51.92 | |||
| 33.26 | 53.53 | Willard Road (SR 6215/SR 8407) | Single-point urban interchange | ||
| 34.14 | 54.94 | Cloverleaf interchange | |||
| 35.47 | 57.08 | Cloverleaf interchange | |||
| Herndon | 36.53 | 58.79 | Trumpet interchange | ||
| 37.75 | 60.75 | Trumpet interchange | |||
| Loudoun | Sterling | 38.98 | 62.73 | SR 267 exit 9 | |
| SR 267 exit 9A; northbound left exit and southbound entrance | |||||
| 39.48 | 63.54 | Trumpet interchange | |||
| 39.98 | 64.34 | Cloverleaf interchange | |||
| 40.60 | 65.34 | Partial cloverleaf interchange | |||
| 41.73 | 67.16 | ||||
| 42.31 | 68.09 | Warp Drive | Northbound exit only | ||
| 43.91 | 70.67 | Cloverleaf interchange | |||
| 44.89 | 72.24 | Southbound entrance only | |||
| Northern terminus | |||||
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi | |||||
| < SR 27 | Two‑digit State Routes 1923-1933 | SR 29 > |