My initial thoughts about zones in high-speed car chases involving road warriors.
Zones on the Road
An important part of the Mad Max movies is the road and the men who drive machines at high speeds over that road. During high speed pursuits, road warriors clamber across car roofs, stand on hoods, and leap from one vehicle to the next. In other words, characters move from zone to zone.
The interior space of most vehicles count as a single zone. The exterior of the vehicle is a separate zone. Larger vehicles, such as 18-wheelers, may have multiple zones, such as inside the cab, outside the cab, outside of the trailer, and the inside of the trailer.
One vehicle can drive too close to another vehicle. When this happens, the exteriors of the vehicles are treated as adjacent zones.
If there is about a car's length distance between two vehicles, the open road in the intervening space count as a zone. This means that leaping from the hood of a car to the back of a truck's trailer over open road count as moving two zones.