What does a solid yellow line mean?

A solid yellow line indicates that no passing is allowed, as it separates opposing traffic. This roadway marking is designed to enhance safety by clearly communicating to drivers that they should not cross this line to overtake another vehicle. If a driver were to attempt to pass in a situation where it is not permitted, they could potentially create a dangerous situation, particularly on two-lane roads where oncoming traffic is present. The solid yellow line serves as a visual cue to help maintain orderly and safe driving practices, ensuring that drivers remain in their designated lane when facing oncoming vehicles. This understanding is crucial for learners, as it emphasizes the importance of adhering to traffic markings for the safety of all road users.