http://www.cnn.com/2006/US/02/07/lapd.gps.ap/index.html
Having been almost mown down in a crosswalk by a police pursuit (no lights/sirens on unmarked cruisers

), it's about time this rule was implemented.
Of course, our "chief" had to add his scholarly two-cents' worth:
Bratton, who often calls the city the car chase capital of the world, was asked why there are so many pursuits in Los Angeles: "There are a lot of nuts here," he said.