（2）后視攝像頭/倒車警告系統(tǒng)

????美國國會早在2007年就要求私家車必須安裝倒車攝像頭，不過美國國家公路交通安全管理局（National Highway Traffic Safety Administration）已然數(shù)次推遲了強制安裝倒車攝像頭的法規(guī)。但是倒車攝像頭對我來說太必要了。有了它之后，你只需要對著中控臺上的屏幕以及屏幕上的黃色倒車線進行操作就行了，這比扭著脖子朝后看有沒有盲點要安全得多，另外還有非常有用的“滴滴滴”的聲音，提示你是否離后面的東西太近了。

2. Rearview camera/backup warning system

????Several times, the National Highway Traffic Safety Administration has delayed rules for rear visibility that would require backup cameras since Congress required them in 2007, but they can't come fast enough for me. It is much safer to watch a screen on your dashboard that has helpful yellow guide lines than to twist your neck over the back of your seat, look around for blind spots, and then try to back up. And don't omit those helpful beep beep beeps that let you know when you've gotten too close.

????It's a radar-based system that detects vehicles travelling in parallel lanes and uses blinking lights in rear-view mirrors to warn when one is in the blind spot. It's very helpful in preventing you from veering into occupied space, along with the attendant horn-honking and name-calling. More advanced intervention systems apply the brakes to nudge the car out of danger.