Alberta Motor Association (AMA) Learner’s Practice Exam

A solid red X over a driving lane is a clear signal that the lane is not available for use, which is consistent with it being reserved for oncoming traffic or indicating that the lane is closed to vehicles. This symbol is universally understood in traffic management as a warning to drivers that they must not enter that lane, usually to ensure safety, manage traffic flow, or give priority to certain types of vehicles such as emergency responders.

Furthermore, solid red X signals are often used in contexts such as reversible lanes or when there is a lane closure due to construction or an accident. They help prevent accidents that could occur if drivers mistakenly enter a lane that is designated for approaching traffic or where they may face other hazards. In the context of these signals, the importance of adhering to these indications cannot be overstated, as they play a crucial role in maintaining order and safety on the road.