A solid white line between lanes of traffic indicates:

A solid white line between lanes of traffic indicates that drivers should stay in their lane. This line serves as a visual guide that reinforces the idea that changing lanes is discouraged or prohibited. It is meant to maintain traffic flow and safety by clearly delineating lanes.

Crossing a solid white line can increase the risk of accidents; therefore, drivers are expected to remain in their designated lanes until they have a safe reason to change, such as if the line were broken or if directed to do so by traffic control devices. The presence of a solid white line signifies a need for caution and adherence to lane discipline, emphasizing the importance of maintaining your position on the road for the safety of all road users.