When can you cross a broken white line?

The reason you can cross a broken white line is that it indicates that lane changes are permitted. This line designates lanes moving in the same direction, and when it is safe to do so, drivers are allowed to change lanes.

It's important to note that crossing a broken white line should always be done with caution. Drivers must ensure that the lane they are moving into is clear and that it is safe to make the maneuver. This ability to change lanes is a critical aspect of maintaining traffic flow and safely navigating the roadway.

In contrast, the incorrect options suggest limitations or conditions that do not align with traffic laws regarding lane usage. For example, stating that crossing is only allowed during heavy traffic or at night suggests unnecessary restrictions that do not apply in general driving practice.