Over reliance on signaling.

The idea comes from intersections in southeast Asia for example. It's a massive free for all with higher safety rates than signalled intersections. In the face of uncertainty, drivers slow and focus on situational awareness and negotiation. That this is actually safer, is counterintuitive.

Which goes go the larger thesis, over reliance on signaling. An idea that if you blindly follow the rules, that you'll be safe. It's the reason you should hesitate look both ways when proceeding from an intersection - to make sure someone else is not barreling thru, and that you're not blindly proceeding on the green to then get t-boned.