What does a solid white line between lanes indicate?

A solid white line between lanes serves as a clear indication that lane changes are discouraged. This line is commonly used on roadways to signify that drivers should remain in their current lane and not cross to the adjacent lane. The purpose of a solid white line is to promote safety by reducing erratic lane changes that could lead to accidents. It typically appears in areas where lane changes could be hazardous, such as near intersections or in high-traffic zones.

In contrast to options that suggest lane changes under specific conditions, a solid white line definitively establishes a guideline for drivers to maintain their lane, emphasizing cautious driving practices. Additionally, unlike the options referring to bike lanes or speeding up, the solid white line does not indicate either of those actions. Overall, understanding the significance of road markings, such as a solid white line, is crucial for safe and responsible driving.