TAMPA - Florida law bars undocumented immigrants from obtaining driver's licenses, but in countless cases that doesn't keep them off the road. Arrests of unlicensed drivers by Hillsborough County Sheriff's Office deputies rose 71 percent from 2001 to 2005. The agency doesn't track how many of those drivers were undocumented, but anecdotal evidence suggests those numbers are rising as more immigrants arrive. A high-profile accident is drawing attention to the issue: A Tampa police detective died in a crash Feb. 25 when one such driver ran a red light and plowed into the detective's city-owned car, the sheriff's office has...