No roller skates, sleds, coasting wagons, toy vehicles, or similar devices are allowed on streets, except on a crosswalk. No person riding on such a device is allowed to attach the device or their self to any vehicle on the street or highway. Bicyclists must yield to pedestrians. Bicycles are allowed on streets and on sidewalks; on sidewalks, bicyclists must ride slowly and announce their presence to pedestrians. Bicyclists must use headlights and rear reflectors after sunset.