It just gets better and better. They are cutting out leisure travel,
aka wasteful hypermobility, and saving lives.

"Highways in the US are at their safest since the 1960s as the
rocketing price of petrol puts a strain on America's love affair with
fast cars.

The number of fatalities on US roads is on track to fall by 10%% this
year to around 37,000 - the lowest since 1961, according to research
suggesting that deaths are plummeting as people cut out leisure
travel, especially in the evenings, to save money.

When global oil prices accelerated during the spring, the number of
fatalities slumped by 22%% in March and by 18%% in April, the University
of Michigan's transportation research institute found.

"It seems as if we have changed our driving behaviour rapidly and
drastically in the last few months," said Michael Sivak, a research
professor at the institute.

As cash-strapped motorists look for savings, they first tend to reduce
their mileage on recreational outings. These are often in the dark and
are more likely to be on high-speed rural roads than on relatively
safe urban commuter routes..."

More:

http://www.guardian.co.uk/environment/2008/aug/26/energyefficiency.usa