Driver's License Test Prep
Two parallel solid white lines running lengthwise down a dark roadway.
MUTCD
3B.04
Position
lane
Color
white
Pattern
double solid
Type
linear
National · Pavement Markings

Double Solid White Lane Line

Two solid white lines forbid lane changes; drivers must remain in their current lane.

Two parallel solid white lines separate lanes of traffic traveling in the same direction where lane changes are prohibited. They are common at toll plazas, the edges of HOV or managed lanes, and through long no-change zones. Crossing a double white line is not permitted; wait until the marking changes to a broken or single line before merging.

In the same family

Related markings

A tall, narrow white-outlined triangle on dark pavement, point at the top and widening toward the base, filled with evenly spaced parallel white diagonal stripes.
White Diagonal Crosshatch (Painted Gore / Channelizing Area)
A tall, narrow triangle with a white outline standing point-up on dark gray asphalt. Evenly spaced white diagonal stripes fill the inside of the triangle from its wide base up to the narrow point.
Painted Channelizing Island
Wide horizontal band of solid red pavement bordered by thin white stripes on top and bottom, on a dark roadway.
Red-Colored Bus / Transit-Only Lane
A single solid white line running lengthwise down a dark roadway.
Solid White Lane Line
A single wide solid white line running straight across the middle of a dark gray pavement background.
White Channelizing Line
Source

AI-generated SVG, Federal MUTCD 11th Edition (2023) Part 3 reference (original)

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