Electronic Speed Signs, Verify How Accurate They Are

Electronic Speed Signs, Verify How Accurate They Are
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Electronic Speed Signs, Verify How Accurate They Are

Electronic speed limit signs catch your eye on the roadside and promise a clear, automatic readout of how fast traffic is moving. Knowing a bit about how they work makes that number less mysterious and helps you decide whether to trust it or treat it as a polite nudge. Many of these signs are essentially...