Ontario MTO Truck Knowledge Practice Test 2024 - Free Truck Knowledge Practice Questions and Study Guide.

A solid line to the left of your lane indicates that it is unsafe to pass. This marking serves as an important visual cue for drivers, signaling that overtaking or passing other vehicles is prohibited in that area. Typically, solid lines are used in situations where visibility is limited, such as on curves or hills, or where there may be other hazards ahead, ensuring safety for all road users. In essence, the presence of a solid line emphasizes the importance of staying within your lane and maintaining safe driving practices, which is critical for preventing accidents and ensuring a smooth flow of traffic.