San Diego is a host for out-of-towners, from Christmas vacationers to business folks to United States Marine Corp and Navy members of the military, raising local DUI arrests, attorneys know.

San Diego is #1 in the country for DUI or drunk driving, according to lawyers citing a new report from Insurance.com.

The company took the number of people applying for insurance quotes through one of its websites, then determined the percentage that reported at least one alcohol-related violation.

This does not necessarily mean San Diego is home to more drunks.

Many reasons cause increased DUI convictions in San Diego, attorneys note. A lack of a functional public transportation system and efficient or enforcement-heavy policing are both cited as reasons making it more likely that individuals will drink and drive or that they’ll be caught doing so.

Los Angeles came second and San Francisco fifth. San Jose, last year’s number two, dropped to seventh on the 2011 list.