What does a red X over a lane signify?

A red X over a lane signifies that travel in that lane is prohibited. This visual cue is commonly used in lane management systems, particularly on highways and at intersections, to indicate to drivers that they should not enter or proceed in that lane. The red X serves as a clear and immediate warning that the lane is either unsafe for use or is being reserved for specific purposes, such as maintenance work or emergency situations.

Recognizing this symbol is crucial for maintaining safety on the roads. It helps prevent accidents that could occur if vehicles were to enter a lane that is closed for any reason. Other options, such as requiring a special permit or allowing only emergency vehicles, do not apply to the meaning of the red X, which is straightforward in its directive to avoid that lane altogether.