What type of line is used to divide lanes of travel in the same direction on the highway?

A broken white line is used to divide lanes of travel in the same direction on the highway. This type of line indicates that lane changes are permitted, allowing drivers to switch lanes as needed. When you see a broken white line, it means you have the flexibility to change lanes, provided it is safe to do so and there is no opposing traffic.

In contrast, a solid white line typically indicates that changing lanes is discouraged or not allowed, as it may signify a zone where lane changes might be hazardous (such as near an exit or entrance). Solid yellow lines separate lanes of traffic moving in opposite directions, indicating that crossing is not permitted. Dashed yellow lines are used in the same context as solid yellow but allow for passing when conditions are safe. Thus, the broken white line is specifically designated for the safe navigation of lanes traveling in the same direction.