It would be nice to know what a vehicle stopped on the shoulder might need if they need assistance. It's dangerous to try and back up down the shoulder after passing a stopped vehicle and noticing that they are struggling to change a tire or need some water or gas.
It would be great if a stopped vehicle could post "need help changing tire" or "out of gas". To get that information ahead of time would allow the ability to make a decision about whether to stop or not and to be able to do so safely.