A bicycle lane is a designated part of the road specifically for cyclists. It is marked by painted lines or physical barriers to separate it from vehicle traffic. Bicycle lanes help ensure the safety of cyclists by providing them with a dedicated space to ride, reducing the risk of accidents with cars and pedestrians. These lanes can vary in design, including protected lanes that have barriers separating them from motor vehicles, and unprotected lanes that are simply marked with paint. Many cities are expanding their bicycle lane networks to promote cycling as a sustainable mode of transportation and to encourage healthier lifestyles.