I built a demo of this at in a weekend for a hackathon and we even had a team member drive around with live updates during our presentation Circling the buildi

I built a demo of this at in a weekend for a hackathon and we even had a team member drive around with live updates during our presentation Circling the building, the gauge for accident risk spiked as the team member drove past the poorly marked entrance to the parking garage of the building we were sitting in. I'd say getting alerts about things like that would be fairly useful because most people don't drive at "maximum safety" all the time. You can get people to slow down at least somewhat closer to the speed limit, get more attentive, etc. in hotspots for accidents. Of course, that might just end up shifting the hotspots in some cases, but more often than not I imagine you'd find an environmental aspect to hotspots, like our poorly marker garage, or areas where sunlight can be blinding during commute hours.