I don't use a radar detector. At the same time, I drove slowly enough, and when combined with the heavy traffic and fairly lenient MoCo cops, speed really isn't an issue. Plus, I have at least a sprinkling of common sense. I mean seriously ride in a car with me, and you will be tempted to be lulled to sleep
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Except that you won't, because the X3's suspension will keep you awake.