Running under the influence (RUI)?

Naturally, my mind turns immediately to thoughts of the Fourth Amendment.  It's an occupational hazard.  How exactly are the cops going to "screen."  Are they going to merely sit in a public place and watch for probable cause (or even reasonable suspicion) that a person is so severely hammered as to be "in a condition that he or she is unable to exercise care for his or her own safety or the safety of others" or "interferes with or obstructs or prevents the free use of any street, sidewalk, or other public way." (Cal. Penal Code §647(f).)  That would be okay, but only the falling-down drunk would qualify.  Perhaps they will be looking for violations of a local ordinance.  In any event, I expect we will see some litigation out of this in the famously litigious City by the Bay (and the Breakers).

* For those unfamiliar with San Fran geography, the race begins at San Francisco Bay on the east side of the city, crosses the peninsula-tip that is San Francisco, and ends at the Pacific Ocean (the breakers) on the west side.