Dallas Display lines are physical louvers designed to prevent drivers in through-lanes from mistakenly following left-turn signals. They are an older safety mechanism being phased out in favor of clearer flashing yellow arrows. Your takeaway: ignore signals that appear obscured or striped from your lane; only follow the light clearly visible directly in front of you.
Dallas Display traffic lights use physical louvers to restrict visibility to specific lanes. Learn why these lines exist and how they impact your driving.