@FailForward I think honestly it would encourage more reckless behavior..
Even if you were driving extremely wreckless your chance of dying within 3 minutes would appear very low, even though in reality its a high number.
Imagine a gauge that said 1%, most would think that would represent pretty safe driving. But if sustained that would represent a 1% chance of death over 3 minutes but a much higher 18.2% chance over the course of any hour and a 33.1% chance over 2 hours.
Presuming you commute an hour to work and an hour back once a day (something not hat uncommon) its a 86.6% chance of death in a week.
Humans have a very very bad perception of exponential growth, which is what such a gauge would show, an exponential growth factor. So most humans would probably die a **lot** faster if they had such a gauge ironically enough.