SAN FRANCISCO (KCBS) -- The latest numbers from the Federal Department of Transportation show that Americans drove 30-billion fewer miles between November and April. While this may be great news for the environment, it also means less gas tax money for highway upkeep.
This trend is the biggest drop since the Iranian revolution led to gasoline supply shortages in 1979 and 1980.
"We're beginning to realize that as we burn more fossil fuel, we put more CO2 into the atmosphere, which is causing global warming, so there's a real impetus to permanently reduce the amount of petroleum fuel that we're burning," said Rod Diridon, head of the Mineta Transportation Institute in San Jose.
A recent study by the Mineta Transportation institute finds 65 percent of driver support a gas tax based on the amount of miles you drive each year, and much your car pollutes.