What does a solid line at the left of your lane indicate?

A solid line at the left of your lane serves as a critical visual cue indicating that it is unsafe to pass. This marking is often used to signify either that the traffic approaching from the opposite direction is too close or that there are other hazards present that could make changing lanes dangerous. When drivers see a solid line, they should remain in their lane and not attempt to overtake another vehicle, ensuring the safety of everyone on the road. Understanding this rule is essential for maintaining safe driving practices and contributing to road safety overall.