Driver's License Test Prep
Vertical white rectangle with a black bicycle symbol above black text reading LEFT TURN MUST USE TURN BOX on three lines
MUTCD
R9-23bL
Category
regulatory
Color
white
Shape
rectangle vertical
National · MUTCD Sign Reference

Left Turn Must Use Turn Box

Bicyclists making a left turn must use the designated bicycle turn box.

Used at intersections with a marked bike turn box to require a two-stage left turn: cyclists ride straight into the box, then proceed left when the cross-street signal turns green. This keeps left-turning bicycles out of conflict with through motor traffic.

In the same family

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All Way Plaque
Red circle on a square white background with the words DO NOT ENTER in white above and below a wide white horizontal bar.
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Horizontal red rectangle with the words WRONG WAY stacked in large white letters.
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Source

Wikimedia Commons: File:MUTCD R9-23bL.svg (Public domain)

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