this post was submitted on 07 Sep 2023
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So you'll occasionally see two white lines perpendicular to the road at a set internal. A helicopter, drone, or plane can time when a car passes both of these lines and can calculate the average speed of the car.
This info is then relayed to a police car on the ground who then pulls over the driver.
Why is that better than the police officer who was going to pull them over just using a speed gun?
shrugs
Less likely to be noticed by drivers or alerts like on Waze. Probably a bit more costly though if they're using helicopters or planes instead of drones.
It seems like if the purpose was stealth then they wouldn’t have a sign announcing it.
Deterrence. You never know when they might be monitoring you above, so watch your speed.