Final answer:
The correct action when you see a pedestrian with a guide dog is to stop at least 10 feet away and allow them to cross safely, avoiding honking to prevent confusion.
Step-by-step explanation:
If you see a pedestrian with a guide dog in the middle of the street, the correct and safest action to take is option (a): Stop no closer than 10 feet and allow the pedestrian to cross. It is crucial to give guide dog users the right of way for their safety and to respect their independence. Honking can confuse or startle both the pedestrian and the guide dog, which makes option (b) unsafe. Proceeding with caution or keeping driving as you were without providing ample space could potentially endanger the pedestrian's life and violates traffic laws regarding pedestrians' right of way.
Understanding the proper way to respond when you encounter a pedestrian with a guide dog contributes to pedestrian safety and is a reflection of responsible and lawful driving behavior. Regarding how far away a car must be before it's safe to cross, generally, the answer depends on multiple factors such as the speed limits, traffic conditions, and your own judgment of the situation on the road.