If our roads and bridges are ass, we should raise the gas tax. I don't know about doubling, but it seems to me it should be raised a bit. (and make sure the gas tax is now is being used appropriately and not on bike paths in rural Idaho or bridges to islands where only 20 rich guys live)
We really, really should. Right now, while gas prices are low
(and seem likely to stay decently low for some time yet), I don't think consumers would mind nearly as much as they would have before the massive gas price drop. This country desperately needs massive infrastructure investment and it's not something we can just ignore.
Far too many politicians are acting like this issue is optional.