Here’s a controversial story: A redditor posted on the /r/Autos forum with the headline “In-Car Breathalyzers in New Cars by 2026.” They included five separate source links and the story went viral before the moderators removed it for being “misleading.” Here’s the truth.

The $1 trillion U.S. infrastructure bill includes $17 billion for automotive safety, including a host of new rules. One of the more inflammatory requires automakers introduce technology by 2026 to “passively monitor the performance of a driver of a motor vehicle to accurately identify whether that driver may be impaired.”

Many outlets added that certain drivers–already convicted of a DUI–must have their vehicles outfitted with monitoring systems to make certain they don’t drive impaired. These are breathalyzers wired into the ignition. But these are active monitoring systems. And that distinction was what made the reddit post misleading. The truth is that all 2026 cars will not come with breathalyzers. They will come with a new form of technolgoy.

As automakers build ever more advanced driver aid software, the NHTSA worries that drivers will trust it too much and crash. So the government is requiring automakers to build systems to monitor the drivers, making sure their eyes are on the road and their hands are on the wheel. Tesla recently had to recall many of its vehicles to update this software, which the NHTSA found was causing accidents because it was too lax.

If a driver were so impaired that they could not keep their yes on the road or their hands on the wheel, they would trigger this driver monitoring system. Eventually the vehicle would deactivate the driver aid software and stop completely.

Under this new bill, the driver monitoring systems may be programmed to detect inebriation specifically. Or perhaps they will just be required to stop when any driver is ignoring the road, no matter the reason. But they will be “passive” systems, not breathalyzer tests that a driver must pass to start their vehicle.