About The Lanes

Express Lanes are open during rush hours on Interstate 66 inside the Beltway between I-495 and Route 29 in Rosslyn, providing new travel options and more predictable trips for all travelers.

Those who drive alone can use the lanes during rush hours by paying a toll. Those traveling with three or more people (HOV-3+)* can continue to ride free. All solo drivers using the lanes during rush hours need an E-ZPass, and carpoolers need an E-ZPass Flex, switched to the High Occupancy Vehicle (HOV) mode, to use the lanes free.

*Effective Dec. 5, 2022, this changed to three or more people (HOV-3+).

Get your E-ZPass or E-ZPass Flex now.

Northern Virginia Express Lanes Network Map (November 2022)

Travel Options

Solo Drivers

If you drive alone, you will have a new option to travel on I-66 Inside the Beltway between I-495 and Route 29 in Rosslyn during rush hours in the main commute direction by paying a toll. All you need is an E-ZPass to pay your tolls.


If you carpool with three or more people (HOV-3+), you can travel on I-66 Inside the Beltway during rush hours for free. You will need an E-ZPass Flex set to HOV mode to travel toll free. The HOV requirement changed from HOV-2+ to HOV-3+ on Dec. 5, 2022. Learn more about that change and incentives to help form HOV-3+ carpools here.

Buses and Other Multimodal Options

Buses can travel anytime on the express lanes without paying a toll. Your bus options will improve from a more predictable trip and expand with the start of new I-66 Commuter Choices, which are being funded by tolls from the I-66 Express Lanes Inside the Beltway. Other I-66 commuter improvements that will help you on and around the express lanes include new park and ride lots, transportation demand management and bike-sharing programs, and technology enhancements.

 Visit I-66 Commuter Choice to learn about multimodal improvements in the I-66 Corridor that are being funded by toll revenue from the I-66 Express Lanes Inside the Beltway.

 Visit Commuter Connections for information on all local commuting options, so you can make a smart choice about how you travel.

How Do The Lanes Work?

Dynamic Tolling

Roadway sensors will monitor traffic volumes. Toll prices will adjust to manage demand for the lanes and keep traffic free-flowing. When there’s more traffic, prices will be higher. When there’s less traffic, prices will be lower.

Toll Price Signs

Overhead electronic signs will display toll prices, letting you know the cost to travel before committing to take the I-66 Express Lanes.

Drivers will see two pricing signs before entering the lanes, and will lock in their toll price before entering the lanes. Signs will show the prices for up to three destinations. If your exit is not displayed, you will still be able to get a general idea of the toll based on the other prices.

Toll Payment

Electronic toll gantries will track your trip to determine the distance of your trip and your toll. Solo drivers will be charged through their E-ZPass.

HOV drivers with an E-ZPass Flex in HOV mode will not be charged a toll.


If you travel on I-66 Inside the Beltway during Express Lane hours, you need to have an E-ZPass funded and properly mounted in your vehicle. If you are an HOV driver, you’ll need an E-ZPass Flex switched to HOV mode to use the lanes for free.

Visit to get your E-ZPass or E-ZPass Flex.