What does a single solid line signify?

A single solid line on the roadway signifies that a lane change is not permitted. This marking serves as a clear visual cue to drivers that crossing the line to change lanes is not allowed. It emphasizes safety by discouraging lane changes where it may be unsafe, such as in areas with high traffic or limited visibility.

The presence of a single solid line indicates to drivers that they should remain in their current lane and not attempt to merge into adjacent lanes. This rule is in place to help reduce the likelihood of accidents that could occur from improper lane changes, especially in areas where such actions could lead to conflicts with other vehicles or obstacles.

Other options regarding lane changes or yielding do not apply in this context, as the primary purpose of the solid line is to indicate that a change of lane should not occur in the interest of maintaining safe traffic flow.