If you work in an industry that's the sort of question that has to be asked so you can quantify what exactly will make a difference. In country towns where everyone knows everyone else's business, there is always someone who drives home drunk, leaves his gun loaded on the parcel shelf, uses his chainsaw to remodel his rafters, has three tractors without rops and rides his 4 wheeler around the paddocks full of stumps in the long grass, flies an old Auster which he beats up the neigbours with, and everyone just nods when he finally becomes a statistic.
About the best comparator for what you described is fatalities per x No of missions or x No of days they went out.
You can then break it up into when they went out x.
Where x = with alcohol in the blood, or drugs, or distractions, or agressive (all in the behaviour group) and so on.
As far as the super-slow school zones, shopping zones and now entry to town zones are concerned, a very detailed London traffic study (I think 30 mph) showed 1 person died falling on a car when it was stationary, the peak of deaths at 2/3 of the speed limit (so about 20) and no deaths over the speed limit.