If some jerk on the sidewalk throws a cardboard box in the road, will it stop all traffic until someone walks out and moves it?

Maybe. Someone wearing a full winter outfit could potentially not register that much heat though, so hard to say. It would still likely show some hotspots, but cars will show hot spots as well and numerous other objects, so you’re back to differentiating between them somehow. I think you just have to have some amount…

From the paper, current state of the art detects ‘difficult’ cyclists with 37% accuracy. Not really a chance I’d like to take.

There are still challenges with this though. Telling the difference between objects that have a similar profile is the big one. I was talking to an agriculture group the other day at a conference and they had a truck that drove itself through an orchard. The main problem? It couldn’t tell the difference between a weed…