What does a solid yellow line mean?

A solid yellow line serves as a definitive marker on the road indicating that passing is not permitted. The primary purpose of this line is to enhance safety and reduce the potential for collisions. When drivers encounter a solid yellow line, it warns them that visibility may be limited or that conditions are not safe for overtaking another vehicle. This is particularly important on two-lane roads where opposing traffic is present, as attempting to pass could lead to dangerous situations, including head-on collisions. Therefore, abiding by this marking is essential for maintaining road safety and adhering to traffic regulations.