I’ve commented repeatedly in the past about how DUI roadblocks (MADD prefers the less oppressive term "sobriety checkpoints") are inefficient at apprehending drunk drivers.  See Do DUI Roadblocks Work?,  Do DUI Roadblocks Work (Part II),  As a means of apprehending drunk drivers, even law enforcement admits they are only effective as a deterrent — i.e., [...]

Read the complete post at http://www.duiblog.com/2010/02/14/the-new-highway-robbery-money-making-dui-roadblocks-growing/