When approaching an intersection, a steady yellow traffic light turns on after green. What is the driver required to do?

1. Accelerate to clear the intersection before the red signal appears.
2. Stop before the stop line, UNLESS stopping safely would require emergency braking, in which case the driver may proceed.
3. Make an immediate U-turn regardless of road markings.
4. Stop in all cases, even if it causes a severe rear-end collision with following traffic.