What feature characterizes a dedicated Bicycle Lane?

A dedicated bicycle lane is characterized by being physically separated from motor vehicle traffic. This physical separation is important because it increases the safety of cyclists by providing a distinct space that reduces the likelihood of accidents with motor vehicles. It typically involves barriers or specific design elements that create a clear division between the bike lane and traffic lanes, promoting a more secure and comfortable environment for cyclists to navigate.

The other options do not accurately describe the key characteristic of a dedicated bicycle lane. For example, allowing both cyclists and pedestrians would not classify it as 'dedicated' since dedicated lanes are primarily for bicycles. Similarly, a bicycle lane that is marked on roadways without separation would be considered a painted bike lane, which does not provide the same level of safety or exclusivity. Finally, if a bicycle lane is open for cars at certain hours, it is not truly dedicated to cyclists, as it allows for mixed use, which compromises the inherent purpose of protecting and prioritizing bicycle traffic.