Jesus christ people the mans talking about a radar gun, you know those things they point at you to see how fast your going. He said that in all his posts.
I dont see why it would be illegal. If they say anything just tell them your doing a study for a school project on why you think the speed limit should be changed on xxx road.
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Driving definitions: Understeer is when you hit the wall with the front of the car and Oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall and Torque is how far you take the wall with you.