The **broken line** on roads is made up of short line segments with spaces between them. Its main function is **to delimit the different lanes of a road**, helping drivers stay in their corresponding lane.

- This line allows drivers to know where one lane ends and another begins, facilitating traffic organization and improving road safety.
- Although generally one should not drive over it, there are exceptions, such as when the lane is very narrow and it is necessary to do so.


Therefore, the purpose of the broken line is clear: **to delimit the lanes** and not to warn about roadworks or traffic prohibitions, as suggested by the other options.