See, that's the rub. You've just said more than the data told you. There's nothing in the stats half of your premise which proves with any certainty that the increased speed limits are the cause of the change in accidents this year. Now you're pushing a political agenda, namely lowering speed limits, while presenting it as part of the basic record of events we call "news", rather than as part of the opinion discourse.
This was even a good faith example. If you were trying to lie with statistics, you could have done much worse.