What is a driver required to do when overtaking a vehicle that is stopped with hazard warning flashers on and carrying a yellow 'Transportation of Children' (Uşaqların daşınması) sign?

1. Maintain highway speed and sound the horn.
2. Reduce speed significantly, exercise extreme caution, and stop if necessary to let children cross the road safely.
3. Flash high-beam lights to hurry the children.
4. Overtake as fast as possible to clear the area.