《那些古怪又讓人憂心的問題》第79期:飛越減速帶(1)
SPEED BUMP
飛越減速帶
Q. How fast can you hit a speed bump whiledriving and live?
Q．最快能以多快的速度駕車衝過減速帶並倖存下來？
A. SURPRISINGLY FAST.
A．非常非常快。
First, a disclaimer. After reading thisanswer, don't try to drive over speed bumps at high speeds. Here are somereasons:
首先，先說明下免責條款：在閱讀完本文後，請不要駕車以高速通過減速帶。原因如下：
You could hit and kill someone.
•你可能會害死別人。
It can destroy your tires, suspension, andpotentially your entire car.
•輪胎、懸掛甚至整輛車都會受到損害或損毀。
Have you read any of the other answers inthis book?
•你難道沒讀過這本書中的其他文章嗎？
If that's not enough, here are some quotesfrom medical journals on spinal injury from speed bumps.
如果這還不夠，那我引用幾條醫學期刊上因爲減速帶而造成的脊髓損傷的案例：
Examination of the thoracolumbar X-ray andcomputed tomography displayed compression fractures in four patients . . erior instrumentation was applied . . . All patients recovered well exceptfor the one with cervical fracture.
腰胸部X光以及計算機斷層掃描結果顯示四位患者有壓縮性骨折……已進行後路椎體融合植入物固定手術……所有患者都恢復良好，除了一位頸椎骨折的患者。
L1 was the most frequently fracturedvertebra (23 /52, 44.2 percent).
一號腰椎骨（L1）是最常發生骨折的脊椎骨（23/52，44.2％）
Incorporation of the buttocks withrealistic properties diminished the first vertical natural frequency from ~12to 5.5 Hz, in agreement with the literature.
具有真實屬性的臀部植入物能夠將人體第一豎直自然頻率從約12赫茲降到5.5赫茲，與文獻相符。
(That last one isn't directly related tospeed bump injuries, but I wanted to include it anyway.)
（最後一條其實和減速帶損傷並沒有直接相關，但我還是想把它包括進來。）
Regular little speed bumps probably won'tkill you
普通的小型減速帶不太會使你喪命
Speed bumps are designed to make drivers slow g over a typical speed bump at 5 miles per hour results in a gentlebounce,1 while hitting one at 20 delivers a sizable jolt. It's natural to assumethat hitting a speed bump at 60 would deliver a proportionally larger jolt, butit probably wouldn't.
設計減速帶的目的就是要讓駕駛員把車速降下來。以每小時5英里（約每小時8千米）1的速度通過一個普通的減速帶只會造成很輕微的彈跳，而以每小時20英里（約32千米）的速度通過減速帶就會造成相當大的顛簸。也許你會由此認爲以每小時60英里（100千米）的速度通過減速帶也會按比例造成更大的顛簸，但其實並不是那樣。
