A square traffic light or lane-control light as in the picture must be obeyed...

Explanation

Lane-control lights are a specific type of traffic light used to manage traffic on a multi-way road, highway or tollway. Typically, these lights allow or forbid traffic to use one or more of the available lanes by the use of green lights or arrows (to permit) or by red lights or crosses (to prohibit)

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This hazard sign indicates...

What does this sign indicate?

A traffic light with one or two red lights, temporarily prohibits the passage of vehicles because of...

Except in special circumstances, all road users are obligated to obey traffic signs...