Quote:
Originally Posted by ichitaka05
When did cop's speedgun get so high tech that, they don't need to be in complete stop to get the accurate speed?
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That's not all that high-tech, and it's been around for a long time. Some of the radar units connect to the police vehicle's speedometer and adjust the speed displayed on the radar accordingly. It's one of the reasons police speedometers have to be checked and calibrated periodically.
You can do the math in your head pretty easily. If you're traveling 50 mph toward a car that is traveling 50 mph toward you, a stationary radar in your car would read 100 mph based on the doppler effect alone. Then you just subtract out your speed (50 mph) to see that the other guy was going 50 mph. It doesn't take a supercomputer to calculate this on the fly if the radar is fed the police vehicle's speed from the speedometer.
There is also a type of motion radar that receives multiple readings on the object in motion relative to its surroundings and adjusts accordingly. But you don't really need that to get an accurate speed if you're feeding it the speedometer data.
In some states the cop doesn't even have to clock your speed. In shitty Texas, for example, a state trooper can stand in court and say that in his expert opinion, he visually judged your speed to be 80 mph. Because the courts in shithole Texas recognize sworn law enforcement officers as speed experts, and because they are presumed by the law to be telling the truth even when they make shit up, the cop's testimony that you were speeding will be accepted as solid evidence of your guilt unless you have some evidence to directly contradict it. So that means that a cop could actually just look at your car and say you were speeding, without having to have any technology at all.
I've been laughing at all these cops boohooing on the news about this bogus "war" that has been declared on them. If it's a war, they declared it long ago and have been winning it for decades.