I always liked this one...
4 LOL's Little Old Ladies) are traveling down the road and they get pulled over by a cop. The cop had pulled her over because she was going too slow. She was on a 65 MPH stretch of road and she was going 27 mph.
The lady asked the officer why he had pulled her over and he said "Well ma'am. I pulled you over because of your speed."
She said... Oh that's not possible because I am ALWAYS very careful to drive the exact speed limit and the speed limit on this road is 27.
The officer smiled and said "Ma'am the speed limit on this road is 65. You're on HIGHWAY 27. But... your 3 passengers look a little pale. Is everyone okay?"
She replied "Oh yes sir. They'll be fine. We just turned off of Highway 105"