What does a "No cycling" sign restrict for cyclists?

The "No cycling" sign is specifically designed to indicate that riding bicycles is prohibited in the designated area. This comprehensive restriction means that cyclists may not utilize any form of cycling, which includes but is not limited to roads, sidewalks, and trails within that vicinity. While other options could be indirectly related to cycling, the "No cycling" sign's fundamental purpose is to specifically restrict the activity of riding bicycles entirely in the area where the sign is displayed. This ensures safety and regulation for pedestrians and the smooth usage of that space for other activities.