The idea behind it is good, but I can imagine that it will lead to accidents.
For example, if the game detects emergency braking too late or not at all, I think it will lead to more dangerous situations and accidents.
Also, I think a lot of players will just rely on the system, so if an accident or hazard occurs due to an error in the system, it can quickly lead to rule violations.
I would be in favour of the emergency braking system being automatically deactivated in busy zones.