First, the possibility of the drunk drivers to be found will be higher if more DUI checkpoints are set. How can we find drunk drivers from thousands and thousands of drivers? It's hard to find drunk drivers when cars on the way, but it's much easier to find them in checkpoints. Checkpoint is one of the most important ways. When drivers go across the checkpoint, they have to be stopped and wait for check one by one.
如果我没有理解错误的话,估计这段话可以满足你的需要.亲,给个好评吧:)