A bike lane is a designated space on a roadway specifically for cyclists. It is marked by painted lines or physical barriers to separate bicycles from motor vehicles, enhancing safety for riders. Bike lanes can vary in design, including traditional lanes next to traffic or protected lanes that offer more separation from cars. These lanes are part of urban planning efforts to promote cycling as a sustainable mode of transportation. By providing safe routes, cities aim to reduce traffic congestion and lower carbon emissions, contributing to a healthier environment and encouraging more people to use bicycles for commuting or recreation.