The summer driving season that kicked off over Memorial Day weekend will see significantly fewer Americans hitting the road, reports CNN: Figures from March released yesterday show the biggest decline in driving since the federal government began keeping records in 1942—down 4.3% or 11 billion miles from last year. Gas consumption for the first 3 months of 2008 is estimated to be about 0.6% lower than the previous year, and the summer consumption is projected to be down 0.4%. (More cars stories.)