From this lane, the only legal move is the one the arrow shows. Lane-use signs assign one job to each lane at complex intersections.
If you are in the lane, make the turn. If the turn is not where you are going, change lanes before the intersection, never inside it.
ONLY means only. The lane has one exit and the arrow is drawing it for you.
Going straight from a turn-only lane because your exit "was right there." The lane you choose 200 feet early is the promise you keep at the light.
Signs that live in the same family, or get confused with this one.
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