What do broken white lines allow drivers to do?

Broken white lines indicate that drivers are permitted to change lanes, provided they do so with caution. These lines are used to separate lanes of traffic moving in the same direction. The presence of broken lines implies that it is safe for drivers to switch lanes when it is clear, allowing for smoother traffic flow and the opportunity to overtake slower vehicles when necessary.

The other options do not align with the implications of broken white lines. Stopping in the middle of the road, parking on the side of the road, or making U-turns are restricted activities in this context, as they do not correspond to the intended use of the space delineated by broken lines. Thus, understanding that broken white lines signify the freedom to change lanes is crucial for safe navigation on roads where these markings exist.