What does a single solid line indicate on the road?

A single solid line on the road serves as a clear indicator that lane changes are not permitted. It is used to inform drivers that crossing this line would be unsafe or illegal due to conditions such as limited visibility, road configurations, or proximity to intersections.

The intention behind this regulation is to promote safety; by prohibiting lane changes where visibility or other conditions are compromised, it reduces the risk of accidents. The solid line acts as a visual barrier meant to guide drivers to stay in their lane and maintain safe distances from other vehicles and obstacles.

Other options do not apply in this context. Lane changes would not be encouraged nor permitted, overtaking is definitely not allowed, and pedestrian crossings are denoted by different markings, typically a crosswalk or specific signage, rather than a solid line.