OVM, where did you get the silly idea that "we as a country are trying to become energy independent"? Because some politicians said so, in a campaign speech? (Pause for hysterical laughter) That's just politically correct PR, they don't mean a word of it - if they did, we'd be putting a lot of resources into the various alternatives to oil, but we're (they're) not.
Our current leadership is heavily dependent on the revenue from oil, and also, at the highest levels, richly rewarded from their investments in the oil industry, why would they want to cut off their own income streams? Because it's healthier, smarter, and safer to use alternatives? I think that story begins with "Once upon a time"!
While those of us whose income is directly correlated to fuel usage have learned to become conservative, (slowing down, mostly), the powers that be don't even care about their own usage: how many gas guzzling vehicles accompany the VIP entourages, how many jets do they think nothing of hopping frequently, for whatever reason, how many really care about energy efficiency?
I think they like the higher speed limits: less chance of their being ticketed by some anal state trooper, when they're in a hurry. Like New Jersey Gov. Corzine, who was going 90 mph, (driven by a state trooper!) when he had the accident recently, on his way to a radio station, for a program he was to be on - a real emergency, I guess.