http://dc.streetsblog.org/2009/06/25/senators-agree-pass-a-clean-reform-free-extension-of-transpo-law/

...Voinovich reminded the Californian that she "is always talking about the environment; [drafting a new transportation bill] is going to have a huge impact on greenhouse gas emissions." He suggested that senators "look at" the House transportation bill offered by Rep. Jim Oberstar (D-MN) and pitch the American public on an increase in the gas tax, which has remained static since 1993. In fact, recent polling supports Voinovich's argument, not Boxer's. A survey released earlier this year by the advocacy group Building America's Future found that 81 percent of Americans would pay more in federal taxes to support infrastructure investments.