The National Highway Traffic Safety Administration has released a report comparing the difference in pedestrian and bicycle crash rates between hybrid electric vehicles (HEVs) and internal combustion engine vehicles (ICEs).
The analysis shows that HEVs are more likely to be involved in pedestrian crashes while performing certain manuevers, namely slowing or stopping, backing up, entering or leaving a parking space, and turning. The authors hypothesize the higher HEV crash rates may be due to HEVs' quiet crusing at slow speeds; when traveling straight (presumably at higher--and noiser--speeds) HEV and ICE crash rates are comparable.
The good news is that pedestrians are less likely to be injured if they are hit at slow speeds. Nonetheless, as HEVs become more prevalent we need to consider carefully how to address the problem of quiet cars. Over in Japan, Nissan has been giving this issue some serious thought, hiring a team of composers to come up with a "beautiful sound" to accompany their electric vehicle the Leaf.
For those feeling less poetic, Datasystem Co has developed a device that will emit your choice of 16 sounds, including a "boing" and a "meow"-- and for the less whimsical, a simple "Excuse me."
Thursday, October 1, 2009
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