Reversible lanes are marked with which of the following indicators?

Reversible lanes are designed to allow traffic to flow in different directions depending on the time of day or current traffic conditions. These lanes are clearly marked with unique signs and signals to indicate whether the lane is open for use or closed to traffic. The specific signs typically provide critical information about the direction of travel that is permitted in the lane and any restrictions that apply.

Using unique signs and signals is essential because they are easily recognizable and convey important information quickly to drivers. This helps ensure that traffic flows smoothly and safely, reducing the likelihood of accidents caused by confusion over lane usage.

Other options, while they may be used in different traffic management contexts, do not serve the specific purpose of indicating reversible lane usage as effectively as unique signs and signals do. Flashing lights might signal lane changes or provide warning, traffic cones can block or redirect traffic but do not convey lane direction, and reflective paint can enhance visibility but does not provide real-time guidance to drivers regarding lane usage.