PETERSBURG, AK Petersburg police are asking bike riders to obey traffic signs, follow the rules of the road and be more careful around pedestrians and motorists this summer. The department and the city’s public safety advisory board have both been fielding complaints about bikers riding on sidewalks and on the wrong side of the road, among other problems. Joe Viechnicki rode his bike down to the police department Monday, crashing once along the way, and spoke to acting chief Jim Agner about bike safety.