Laws are all fine and good, but unless they are STRINGENTLY ENFORCED 24/7/365 it's just after-the fact. Someone is hurt or worse (As we are seeing again today).
I think The 3 most prevalent problems are:
Distracted driving - all the automakers need to incorporate some sort of cell phone blocking devices in all new cars going forward.
Apathy by law enforcement - ALL POLICE agencies need to get serious about enforcing the MOVE OVER LAWS.
Alcohol use/abuse - Laws don't protect all our First Responders from all the drunks on the road. I wish I had an answer for that.
I cringe every time I see the header 'TOWER DOWN' in my email inbox. Always hoping it's nobody we know, and still saddened that it happened yet again. I look forward to the day when we no longer get those.