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Can you trust radar speed signs?

Why their readings aren't always accurate

  • Scenic cityscape of downtown Toronto Ontario Canada during a sunny day

Radar speed signs, those interactive signs constructed of a series of LEDs that display a vehicle’s speed as motorists approach, are becoming more common on city roadways. They’re intended to slow cars down by making drivers aware when they are driving at unsafe speeds. But are their readings accurate? Wheels.ca expert Eric Lai hit the streets to find out …


  • Can you trust radar speed signs?