If there was an executive order (not saying we would ever get one) to reduce the national speed limit to 55 MPH a lot of gas would be conserved. It would be easy to do and I think it would appeal to our patriotism and need to contribute to the greater good at a time of crisis.
There isn't a lot of good ideas floating around out there to ease gas demand, (don't drive if you don't have to seems to be a no brainer), and it worked in the '70's. I just thought I would throw this out there because I think it would be useful to add to the dialogue.