What must you do when you see a solid center line on your side of the road?

When you see a solid center line on your side of the road, it indicates that lane changes are restricted. The solid line serves as a visual guide to communicate that passing or changing lanes is not allowed from that position. It’s essential for maintaining safety on the road, as these lines are often used in areas where visibility is limited or where passing would be dangerous due to factors such as curves, intersections, or the presence of oncoming traffic.

In contrast, changing lanes immediately would violate traffic laws, and proceeding with caution does not address the restriction implied by the solid line. Speeding up to get ahead can also pose dangers, as it can lead to aggressive driving behavior and potential accidents. Therefore, the correct course of action when encountering a solid center line is to not change your lane and adhere to the traffic regulations designed to keep you and other road users safe.