Mark Rober just set up one of the most interesting self-driving tests of 2025, and he did it by imitating Looney Tunes. The former NASA engineer and current YouTube mad scientist recreated the classic gag where Wile E. Coyote paints a tunnel onto a wall to fool the Road Runner.
Only this time, the test subject wasn’t a cartoon bird… it was a self-driving Tesla Model Y.
The result? A full-speed, 40 MPH impact straight into the wall. Watch the video and tell us what you think!
They’re not reading speed limit signs; they’ll follow the speed limit noted on the reference maps, like what you see in the app on your phone.
There’s a lot of cars that check via camera too to double check, for missing/outdated information and for temporary speed limit signs.
Lots of places also have variable limit signs that get updated based on traffic, accidents etc.
Here in NZ those seem to all be marked on the speed limit maps as 100km/h even if in some places the signs never go above 80.
Ngauranga Gorge is one such location and I believe has the country’s highest grossing speed camera.
Where I live there are a lot of “temporary” 30km/h speed limits that were never removed by the road workers after the work was completed.
Yikes, there’s a 25 around here that shows up as a 55 in Google Maps.
Also a 55 that goes down to I think 35 for just a moment when it joins up with a side road. I wonder what a Tesla would do if it was following that data.
The same thing a Tesla always does: behave erratically and dangerously.