• Elgenzay@lemmy.ml
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      1 hour ago

      Are you talking about the 2 lights on the bottom? Is that not common everywhere? The left one is probably a left arrow to indicate a protected left turn, and the right one is solid.

      I don’t know if this is a US-only thing or all countries where they drive on the right side of the road but without the green left arrow, left turns on a solid green light are unprotected and must yield to oncoming traffic.

      The arrow can also be flashing yellow on some intersections to indicate an unprotected left turn regardless of the state of the solid lights.

      Similarly, a green right arrow can be present at solid red lights to indicate a protected right turn. Otherwise, you can still turn right on solid red (unless a sign explicitly prohibits it) but must yield. Right arrows are much less common than left.