SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/drive-edge-line-colors

On a divided highway, what color is the edge line on your LEFT side?

Yellow on the left edge, white on the right edge.

  1. White
  2. Orange
  3. Yellow ✔

Why: On divided highways and one-way roads, the left edge line is yellow and the right edge line is white. If yellow is on your right, you are going the wrong way.

Huh, didn't know that: Two-way left-turn lanes and reversible lanes are also outlined in yellow.

The dad joke
Why did the edge line stay calm? It never let things push it over the edge.
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References

Answer: Yellow. On divided highways and one-way roads, the left edge line is yellow and the right edge line is white. If yellow is on your right, you are going the wrong way.

  1. MUTCD 11th Edition with Revision 1, Section 3A.03 mutcd.fhwa.dot.gov/pdfs/11th_Editionr1/mutcd11theditionr1hl.pdf
    When used, yellow markings for longitudinal lines shall delineate: A. The separation of traffic traveling in opposite directions, B. The left-hand edge of the roadways
    Checked 2026-10-09.
  2. MUTCD 11th Edition with Revision 1, Section 3A.03 mutcd.fhwa.dot.gov/pdfs/11th_Editionr1/mutcd11theditionr1hl.pdf
    The separation of two-way left-turn lanes and reversible lanes from other lanes.
    Checked 2026-10-09.

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Test yourself in the game

Cars & DrivingYellow lines on the road separate traffic moving which way?Cars & DrivingOn a two-lane road, a broken yellow line is on your side of the center. What does it allow?Cars & DrivingTwo solid yellow lines down the middle of the road mean what?

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