National speed limit pushed as gas saver is an article that indicates Va R Senator John Warner has asked Secretary of Energy Samuel Bodman to investigate the optimal gas saving speed limit under today's technology. The article doesn't really say, but it appears that Senator Warner is supposing that prices can be driven downward by influencing demand. And, I believe that it is true that a drop in Demand can force prices downward (providing there is profit opportunity for the production chain).

The question that I didn't see asked was "How much usage decrease would a National Speed Limit provide"? Because, maybe it isn't Senator Warner's goal (well, let's face it, his goal is to be reelected) to reduce the price of gasoline. Maybe it's his goal to stretch what we have.
Energy Department spokeswoman Angela Hill said the department will review Warner's letter but added, "If Congress is serious about addressing gasoline prices, they must take action on expanding domestic oil and natural gas production." Am I missing something?
Where is the push for alternatives? If we are serious about reducing our (the US of A) dependance on foreign fossil fuels, then we should be aggressively developing and adopting alternative technologies. This is Econ 101. One reason Apple is so successful is that it's products are viewed as alternatives to the "standard" (Windows, Cell Phones, MP3 players).
Obsticles to developing alternatives to gasoline:
People need cars that use the alternative fuel. Last time I checked, the one's that were available were expensive. Create a government incentive for people to use an alternative fuel automobile.
Cars need places to refill with the alternative fuel. This is perhaps the largest impediment to national adoption of an alternative. Where do I get hydrogen, or helium, RU-232, or whatever the alternative fuel is? There's no infrastructure in place. We need distribution capabilities for the alternative fuel vehicles.
What is the correct alternative? Cars, infrastructure, everything else doesn't make a difference if we don't all choose a common path. Beta vs VHS and BluRay vs HD are small examples of why this is a sticky issue. People bought and used BetaMax tapes and HD DVDs as well as the players for those media types. Now, those players have no use. The production facilities for Beta and HD have to be retooled to be useful. Making that kind of change at the national level for alternative fuel sources (assume that SuperFuel and MaxGo are the two dominant alternative fuel sources) could have astronomical costs. SuperFuel looses the battle. What happens to the SuperFuel vehicles? Is the SuperFuel distribution chain adapabile to other uses? What about the SuperFuel depots - is each of them a potential toxic waste site? Without revenues to support the re-tooling, who would pay for the clean-up?
This isn't an easy issue. There's no simple solution. Instituting a National Speed Limit sounds like a simple solution. Solution? What would it solve?
Read this article for a slightly different perspective. And, of course, not everything about higher gas prices is bad: 10 Things You Can Like About $4 Gas