You want to turn left at the next intersection. A white sign there shows a black left-turn arrow inside a red circle with a red slash across it. What does the sign tell you?

Correct answer: You may not make a left turn at this intersection

Why

Regulatory signs with a red circle and a red slash forbid the action shown inside, for example a left turn, a right turn or a U-turn. Look at the symbol to see which move is forbidden. If you need to go left, continue to a place where the turn is allowed and plan your route from there.

Verified against New Mexico Driver Manual · Regulatory signs · p. 9