I guess our city is one of few that has some sidewalks that are marked on the left as bike and on the right as pedestrian. So, I have to assume it's not against the law to ride on those sidewalks. They are fairly wide as well. I've seen these next to really busy roads where there is no room for riding on the road without being out in traffic. Fortuanately, we do have lots of roads that do have the bike lanes. However, I have found that you have to be really careful if you choose to ride on those sidewalks through intersections and across driveways.