The sign "Bike expressway" indicates a designated route specifically for bicycles. This means that the path is intended solely for bicycle use, and motor vehicles are prohibited from using it. When you see this sign, it is important to adhere to the regulations, as it helps ensure the safety of cyclists and promotes efficient cycling travel. If you are driving in the area, you should be cautious and avoid the bike expressway, allowing cyclists to pass freely and safely. Always be alert for cyclists in nearby lanes or areas, especially when entering or crossing bike pathways.