What is the minimum width for an on-street bike lane that has marked parallel parking?

The minimum width for an on-street bike lane that has marked parallel parking is established by safety and operational guidelines. A bike lane that is 1.5 meters (approximately 4.92 feet) wide allows sufficient space for cyclists to ride safely alongside parked cars. This width provides a buffer that helps reduce the risk of conflict between cyclists and opening car doors, which is a common hazard in areas with parked vehicles.

Additionally, the 1.5-meter width is generally accepted in various planning guidelines as an appropriate minimum for providing adequate room for cyclists while ensuring that the lane remains functional even in scenarios where bike lanes are adjacent to parked cars. Wider lanes may offer additional comfort and safety, but 1.5 meters meets the standard requirement for a bike lane in this context.

In contrast, widths smaller than this would not provide adequate space for safe cycling next to parked cars, increasing the likelihood of accidents. Options suggesting a width greater than 1.5 meters are not the minimum requirement and reflect more ideal conditions, which might be implemented in cases where additional space is available.