Study co-authors Michael Morrisey, director of University of Alabama at Birmingham's Lister Hill Center for Health Policy, and David Grabowski of Harvard Medical School said that higher gasoline prices do come with a plus side -- deaths from traffic accidents drop significantly as people slow down and drive less.

If gas remains at $4 a gallon or higher for a year or more, traffic deaths could drop by more than 1,000 per month nationwide, the researchers said.

"It is remarkable to think that a percent change in gas prices can equal lives saved, which is what our data show," Morrisey said in a statement. "For every 10 percent rise in gas prices, fatalities are reduced by 2.3 percent. The effects are even more dramatic for teen drivers."

The research included death rates and gas price changes from 1985 through 2006, and the calculated percent reduction in fatalities can be extrapolated to 2008 and beyond, Morrisey said.

In 2006, there were 42,642 total U.S. traffic deaths from 38,588 fatal crashes. the Fatality Analysis Reporting System reported.