The Dulles Access Highway is a free road reserved for traffic going to or from the airport. The Dulles Toll Road runs alongside it, charges tolls, and serves local exits in Tysons, Reston, and Herndon. Both carry the Virginia Route 267 designation, which is why drivers mix them up, and both share the same median where the Metro Silver Line runs. If you are going to the airport, you want the Access Highway. If you are going anywhere else along the corridor, you are on the Toll Road.

The two roads were built decades apart. The Access Highway opened with the airport in 1962 as a dedicated route from the Capital Beltway. The Toll Road was added in the 1980s on the outer lanes to give the growing suburbs a way to use the corridor without clogging the airport route. The result is a four-roadway system that works well once you understand the rule.

Who is allowed on the Dulles Access Highway?

Only vehicles with an airport destination or origin. The inner lanes have no exits between the Beltway and the airport terminal area, which is the point: commuter traffic cannot use it as a shortcut because there is nowhere to get off. Passengers, airport employees, deliveries, and ground transportation all qualify. Driving it to reach Reston or Herndon is not possible; you would end up at the terminal loop and have to drive back out.

How does the Dulles Toll Road work?

The Toll Road is the outer roadway in each direction. It collects a toll at a main plaza near the Beltway and smaller tolls at each exit ramp. E-ZPass is the practical way to pay; cash lanes have been reduced over the years. Rates change periodically, so check the operator's website before a trip, but a full-length passenger-car trip costs a few dollars each way. The Dulles Greenway, a separately operated toll road, continues west from the airport to Leesburg and has its own, higher tolls.

Why does this matter for airport rides?

Trip time and predictability. A ride from Dulles to Tysons on the Access Highway is 25 to 35 minutes most of the day because nothing interrupts it until the Route 7 and Route 123 exits. The same trip on local roads can take twice as long. A driver who runs this corridor daily will always use the Access Highway for airport trips, which is why a quoted time from an airport car company usually matches the clock. Limos 4 Less drivers use the Access Highway for every Dulles airport pickup and drop-off, and the company quotes tolls up front on the rare trips that need the Toll Road or the Greenway.

When is the corridor slow?

• Weekday mornings, eastbound toward the Beltway, 6:30 to 9:30 AM

• Weekday afternoons, westbound toward the airport, 4:00 to 6:30 PM

• Friday afternoons year-round, both directions

• The first snowfall of the season, when the outer Toll Road lanes are cleared after the inner lanes

• Major event days in Tysons, when the Route 7 and 123 exits back up onto the roadway

Even in those windows the Access Highway moves better than the Toll Road because it has no exits to back up, but it is not immune. A good driver adds 15 minutes to an airport run in the morning rush.

What about the Silver Line in the median?

The Metro Silver Line runs between the two roadways from the Beltway to the airport and on into Loudoun County. It is why you see trains while driving. For travelers without luggage going to Tysons or into DC, it is a fair option. For anyone with checked bags, an early flight, or a late arrival, a car on the Access Highway is faster door to door.

How do the roads look from the driver's seat?

Coming from the Beltway, the Access Highway and Toll Road split almost immediately after the interchange, and the signs are clear: "Dulles Airport Only" for the inner lanes, "Toll Road, Local Exits" for the outer lanes. Miss the split and you cannot cross over; the roadways are separated by barriers for the full length. Heading east from the airport, the Access Highway runs straight to the Beltway and I-66 with one decision point at the end, where traffic bound for Tysons uses the Route 123 or Route 7 exits and traffic bound for DC continues onto I-66. Drivers who do this trip every day know which lane to be in a mile ahead of each split, which is the small skill that keeps a 30-minute trip at 30 minutes.

Frequently Asked Questions

Is the Dulles Access Highway free?

Yes. It has no tolls because it is restricted to airport traffic.

Can I use the Access Highway to get to Reston?

No. There are no exits before the airport, so you would end up at the terminal.

What happens if I take the Access Highway by mistake?

You drive to the airport, loop through the terminal area, and come back out. Allow 15 to 20 extra minutes.

Does the Toll Road accept E-ZPass?

Yes. Cash lanes have been reduced, so E-ZPass is the practical option.

Does the Metro Silver Line run in the same corridor?

Yes, in the median between the Access Highway and the Toll Road.