United States Customs and Border Protection plans to log every person leaving the country by vehicle by taking photos at border crossings of every passenger and matching their faces to their passports, visas, or travel documents, WIRED has learned.

The escalated documentation of travelers could be used to track how many people are self-deporting, or leave the US voluntarily, which the Trump administration is fervently encouraging to people in the country illegally.

CBP exclusively tells WIRED, in response to an inquiry to the agency, that it plans to mirror the current program it’s developing—photographing every person entering the US and match their faces with their travel documents—to the outbound lanes going to Canada and Mexico. The agency currently does not have a system that monitors people leaving the country by vehicle.

“Although we are still working on how we would handle outbound vehicle lanes, we will ultimately expand to this area,” CBP spokesperson Jessica Turner tells WIRED.

Turner could not provide a timeline on when CBP would begin monitoring people leaving the country by vehicle. She tells WIRED that CBP currently matches photos of people coming into the country with “all documented photos, i.e., passports, visas, green cards, etc,” but could not confirm or deny whether CBP may integrate other photos or data sources in the future.

When asked, Turner says it’s not currently evident that a purpose of the outbound face-matching system would be tracking self-deporations. “Not to say it won't happen in the future, though, with the way self-deportation is going,” Turner says.

WIRED reported this week that CBP recently asked tech companies to send pitches on how they would ensure every single person entering the country by vehicle, including people two or three rows back, would be instantly photographed and matched with their travel documents. CBP has struggled to do this on its own. The results of a 152-day test of this system, which took place at the Anzalduas border crossing between Mexico and Texas, showed that the cameras captured photos of everyone in the car that met “validation requirements” for face-matching just 61 percent of the time.

Currently, neither CBP nor Immigration and...