broken line

WordReference Random House Unabridged Dictionary of American English © 2025

bro′ken line′, 

1. a discontinuous line or series of line segments, as a series of dashes, or a figure made up of line segments meeting at oblique angles.
2. a highway marking consisting of a series of disconnected line segments painted between lanes of a roadway, indicating that crossing from one to the other is permissible.