http://news.cnet.com/8301-11128_3-10019386-54.html

the coolest & cleanest air
is as far as possible from the hot blacktop pavement
which ... strangely ...
might even be a good source of solar energy collection

truth is stranger than fiction

18 wheel trucks have located their air inlets up high
to get cooler air and less road grit
for a long time

it is time for pickup drivers to be as wise as the pros