Final answer:
The path of travel should maintain a clearance of 24 inches for safety unless a barricade is present. For pedestrians, they should wait for a gap equivalent to about 12 car-lengths before crossing a street safely.
Step-by-step explanation:
The path of travel should have a clearance of 24 inches to ensure safety unless a barricade is provided, in which case no clearance is necessary. This distance allows enough space for people to pass by without any obstruction, and aligns with safety guidance for clear pathways. In the context of automotive safety, when crossing the street, a general rule of thumb for pedestrians is to wait until there is enough space equivalent to approximately 12 car-lengths before it's safe to cross, which should provide sufficient time for a car to stop if necessary.