Driver's License Test Prep
A row of small evenly spaced white square dots running lengthwise down a dark roadway.
MUTCD
3B.04
Position
lane
Color
white
Pattern
dotted
Type
linear

Dotted White Extension Line

Short white dots extend a lane line through a merge, exit, or intersection area.

Closely spaced short white dots extend a lane line through an interchange, intersection, or auxiliary-lane area to guide drivers across a gap in the normal striping. The dotted pattern signals that the lane continues but is shared, dropping, or merging; drivers should track the dots to stay aligned with their intended lane and watch for entering or exiting traffic.

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