What does a white line between lanes signify?

A white line between lanes signifies that the lanes can be changed. This means that drivers are allowed to change lanes when they see a white line separating them. It indicates that the lanes are designated for moving in the same direction, and diverging or merging into another lane is permissible, provided it is done safely and with proper signaling.

The presence of white lines also helps traffic flow by clearly demarcating the boundaries of each lane, allowing drivers to make informed decisions about lane changes without the confusion that can arise from ambiguities in road markings. This is particularly important for maintaining orderly traffic and reducing the likelihood of accidents during lane changes.