The agreement is between the Federal Highway Administration, the Virginia Department of Transportation along with 95 Express Lanes LLC and Capital Beltway Express Lanes LLC, both of which are subsidiaries of Transurban, the Australian-based corporation that operates the toll lanes. The agreement covers a three-year period, but can be extended.

The Federal Highway Administration is working on a schedule, so it’s unclear at this point when testing will begin. The agreement calls for initial testing to be done when the express lanes are closed. Eventually, the pact says testing will be done “under light traffic conditions.”