With DEFCON in safe mode this year, CHV has gone virtual as well. But that doesn't mean you can't hack cars. We have a number of cars across the globe connected to Raspberry Pis, allowing hackers to SSH in and send CAN messages.
Once you're to the front of the line, you'll see a console appear with SSH instructions. You'll have 30 minutes with the vehicle to solve CTF challenges or whatever else you'd like.