A Little Humor ....
A police officer found a perfect hiding place for watching for speeding motorists.
One day, the officer was amazed when everyone was under the speed limit, so he investigated and found the problem.
A 10 years old boy was standing on the side of the road with a huge hand painted sign which said "Radar Trap Ahead."
A little more investigative work led the officer to the boy's accomplice: another boy about 100 yards beyond the radar trap with a sign reading "TIPS" and a bucket at his feet full of change.