A 4th of July sobriety checkpoint in Salinas, CA
stopped over 700 drivers. This is almost .5% of the entire population of the city. The result? Not a single person was arrested for DUI. Not one.
Sobriety checkpoints involve a large number of officers, usually being paid overtime rates and the return on this investment in time and money is often much like this example. Few if any DUI arrests are actually made. Denver area arrest numbers have yet to be released. The more effective means of making an impact on the issue of alcohol and driving is to take these same officers and put the in patrol cars. They can cover a greater area and not interfere with people who aren't breaking any laws.