I'd suspect they do that already - based on what I've read they're not relying entirely on signage and the lidar is looking for potential hazards. I'd suspect

I'd suspect they do that already - based on what I've read they're not relying entirely on signage and the lidar is looking for potential hazards. I'd suspect it act similarly to a human in that situation. Maybe it'd run it if there's no one else around, but a human probably would too in that case.