Broken White Line - Meaning

All you need to know about the broken white line road marking: meaning, rules, what to do and more

broken-white-line
Type: pavement marking
Line Color: white
Line Type: broken
Location: between traffic lanes moving in the same direction.

What does a single broken white line mean?

A broken white line in the middle of the road divides traffic lanes moving in the same direction. A single broken white centerline indicates that you are allowed to cross the line when it’s safe to do so.

TIP: Studying for your DMV test? Check out our list of road signs and their meanings

Broken White Centerline - What To Do

When driving on a road marked with a single dashed white line, you can change lanes by crossing the line if it is safe. Always be cautious when making lane changes.
Test Your Knowledge of Road Signs Take a Free Road Signs Practice Test
DMV Test Tomorrow? Get Your Cheat Sheet Now!
Everything you need to pass your Iowa DMV written test.
2026 EDITION
See questions based on real Iowa DMV exams with clear explanations.
Get Cheat Sheet →
$29.99 $14.99 · One-time payment
Test Your Knowledge of Traffic Signs Take a Road Signs Test Now
2026 Edition
Road Signs are only 20% of the DMV Test
See 150 real exam questions and get ready to pass.
Get Study Guide →
Study Guide Q&A