Small red street-crossing flags were placed in plastic holders in crosswalks at 10 intersections across Chicago.
Male pedestrians are more likely to be struck and killed than females on New Jersey roads.
That's one of the findings in the 2011 Pedestrian Safety Tracking Report conducted by the Voorhees Transportation Center at Rutgers University.
The study analyzed police data in accidents in which a pedestrian died or was injured from 2003 through 2010.
Researchers found more male than female pedestrians die because they are walking late at night.
The report also found that accidents resulting in injury declined between 2008 and 2010 when vehicle miles traveled also dropped.
Senior research specialist Charles Brown tells The Record newspaper the decline reflects the state's law that requires motorists to stop for pedestrians in a crosswalk, as well as infrastructure improvements, and a more educated public.