Final answer:
Option 4. is correct. The sign instructs drivers to slow down because the road ahead is in poor condition, which implies there could be surface damage, potholes, or other hazards that require careful navigation.
Step-by-step explanation:
The sign 'Slow down to maintain control; the road ahead's in poor condition' indicates that the road is in poor condition. This suggests that there may be potholes, uneven surface, or damaged areas which can pose a risk to vehicles traveling at higher speeds. By slowing down, drivers can maintain better control of their vehicle and navigate through the damaged road sections more safely.
The sign 'Slow down to maintain control; the road ahead's in poor condition' indicates that the road is in poor condition. This means that there may be potholes, cracks, or other hazards on the road that could make driving difficult or dangerous. By slowing down, drivers can better navigate these conditions and maintain control of their vehicle.