Final answer:
There are typically six zones around a car relating to defensive driving, and the safe distance to cross in front of a vehicle varies but can be estimated by allowing at least one car-length per 10 mph of the car's speed.
Step-by-step explanation:
The number of zones around a car generally refers to the space surrounding a vehicle that a driver must be aware of, often for the purpose of safe driving. However, it sounds like the question may be combining two different concepts: zones for defensive driving and the recommended safe distance for pedestrian crossing.
In terms of defensive driving, there are typically six zones around a car that include: the front zone, rear zone, left front zone, right front zone, left rear zone, and right rear zone. These zones represent the areas around the car that a driver should monitor to avoid collisions and maintain situational awareness.
Regarding the safe distance to cross in front of an oncoming vehicle or determining how many car lengths are considered safe, this can vary based on speed and conditions. A simple rule of thumb is to ensure there is enough gap in the traffic that allows you to cross safely without the driver having to slow down or stop for you. A common guideline given is to aim for at least one car length for every 10 mph of the car's speed. However, this will depend on specific conditions such as road type, weather, visibility, and the pedestrian's walking speed.