I thought this was pretty interesting, not about radar or laser though.
Car Air Fresheners May Save Lives, Study Says
POSTED: 4:20 pm CDT April 26, 2005
A simple addition to your car could help you stay alert and avoid a potential crash, Detroit television station WDIV reported.
Each year about 100,000 car crashes occur because people fall asleep at the wheel, the station said.
But according to a study that was commissioned by AroMetrics and conducted by researchers at Wheeling Jesuit University, placing an air freshener in your car or adding a scent may reduce fatigue and increase alertness.
Researchers said pine is especially effective for alertness and scents such as strawberry helped reduce road rage.
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