With an accurate camera in said device above intersections so monitored, we should be able to go to a web page to see who was driving the vehicles who nearly hit us, and tell if they were distracted by devices, drinking alcohol, or what ever was their problem that affected their judgement.
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If repeat-persons get their image captured, that should result in a cautionary warning so police would approach their vehicle with some degree of suspicion; and elevate their point scores. 
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Perhaps have repeat offenders who didn't kill anyone but break the law anyway, take defensive driving courses also venture out to clear the roadway of accident debris and work alongside the right-of-ways to patrol litter. They'd get to wear orange safety vests and plastic hats, gloves. Just like real people on a mission.
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Maybe those scofflaws whose antics cause misery and cost others money, time, or their lives, can be put in a place that makes them get re-training; or an electronic anklet & a bus pass. ;)