Yes, another Jalopnik link...
Posted below is a great, well-researched analysis on the basis behind speed limits and why they're set the way they are. Short version: They are too low and increasing some in specific areas actually will REDUCE traffic fatalities. Local news just wants a story that catches your eye (even if its not actually factual or researched). Yes there are exceptions to every rule, but that doesn't warrant not doing the research or having the conversation. In many areas that have unnecessarily low limits, they could safely be raised allowing local police to target drivers excessively speeding, not just keeping up with traffic.
The biggest sticking point I have is about how with current laws, certain driving situations can actually be impossible to follow the law (5:00 in the video) - (#10 on both of these links)
15 min seems long but its well worth the watch.