Your Car May Soon Know You’ve Been Drinking Before You Even Start Driving

Okay, this one feels like something from a movie, except it is already being shown in real life.

A new system shown at the Beijing Auto Show can check whether a driver has been drinking through a car’s touchscreen. No breathalyzer. No awkward tube. No camera staring into your eyes. Just a fingertip on the screen.

The idea is surprisingly simple. Aumovio SE and trinamiX built near-infrared sensors into the touchscreen glass. When someone touches the display, light passes through the skin, reads what is happening underneath, and the software looks for signs of alcohol in the bloodstream. It only takes a few seconds, and from the driver’s side, it would feel like using the screen normally.

That is what makes it interesting. Every new car already seems to have a giant screen. Drivers already tap it for maps, music, climate settings, whatever. So instead of adding another device people have to think about, the alcohol check gets built into something they already use.

This is not the first attempt to solve drunk driving with technology. Programs like DADSS have been working on passive alcohol detection for years, with support from NHTSA and the auto industry. The problem has always been making it accurate, fast, and invisible enough that sober drivers do not feel punished every time they start the car.

The touchscreen version may get closer to that.

And the reason companies keep chasing this is obvious. Drunk driving is still killing thousands of people every year in the U.S. The campaigns, checkpoints, and warnings all matter, but they have not solved it. At some point, the car itself becomes part of the prevention system.

Of course, the questions come immediately. What if a passenger touches the screen? What about hand sanitizer? What if the sensor gets it wrong? The companies say the system reads alcohol in the bloodstream, not residue sitting on the skin, and it can be set up to read only from the driver’s side. That sounds reasonable, but it still needs serious real-world testing before people fully trust it.

There is also the privacy side, because a car checking your body chemistry is not exactly a small thing. Some people will see this as a safety breakthrough. Others will hear “my car is monitoring me” and get uncomfortable fast.

Either way, this is not just a random concept. Congress already pushed NHTSA toward developing standards for passive alcohol detection in new vehicles through the 2021 infrastructure law. The rules are not final yet, and the timeline has moved, but the direction is clear.

No major automaker has promised this exact touchscreen system in a production car yet. But the fact that it was shown working at a major auto show says plenty.

This may not be in every car tomorrow. But it no longer feels far away.