What is the purpose of lane use signals?

Lane use signals are specifically designed to manage traffic flow by indicating lane direction changes, often based on the time of day or specific traffic needs. These signals are typically used in areas where a lane may be reversed to accommodate high traffic volumes during peak periods. For example, a lane might be designated for inbound traffic during the morning rush and then switched to outboard traffic in the evening. This dynamic management helps optimize road use and reduce congestion.

The other choices do not accurately represent the primary function of lane use signals. Indicating speed limits pertains to regulatory signs rather than lane signals. Closure of lanes is typically communicated through barrier signs or cones, while road conditions are usually conveyed through advisory signs or variable message boards rather than lane use signals. Thus, selecting the option regarding reversing lane direction reflects an understanding of the specific role that lane use signals play in traffic management.