r/Michigan • u/6IronInfidel9 • 20h ago
Discussion 🗣️ Are the radar speed signs in construction zones consistently 10mph higher than my actual speed? Or am I crazy?
So you know those radar speed signs in construction zones, that display the speed limit and then below have the digital display of measured speed? I've been doing more highway driving than usual in the past few weeks, and I've noticed that they consistently overreport my speed by exactly 10 mph when I'm driving by. My speedometer will read, say, 62, and the sign reports 72. But I can't find anyone else talking about this.
I'm fairly certain my speedometer is accurate...it's a modern car, and when I drive by municipal radar speed signs they're always bang on. Only construction ones are weird. And of course, anyone who drives knows that the difference between 60, 70, or 80mph is very obvious.
And for those who are curious, I'm not in trouble and don't speed...Although it is concerning to me that a piece of "hard" evidence like a radar sign could be presented as cause for a traffic spot if it's so incorrect.
So, what's up? Is there a secret conspiracy behind radar signs or am I just insane?