BRAD PITT has an usual new job.. slowing traffic in Siberia. A Russian newspaper reports that cardboard cutouts of Pitt have been placed near the most dangerous intersections in Siberian city of Omsk, in the hope that drivers will reduce their speed to get a good look at the star. "There are many dangerous spots in Omsk, but a shortage of policemen" said one local official. " We had to improvise"