Final answer:
The subject of the question is Traffic Regulations and the consequences of parking in a restricted zone.
Step-by-step explanation:
In this case, the zone being referred to in the question is a designated area where parking is not allowed. If a vehicle is parked in this zone, it will be towed away at the owner's expense. This is a common practice implemented to ensure the smooth flow of traffic and prevent obstruction. It is important for drivers to be aware of and comply with traffic regulations to avoid penalties and ensure safety on the roads.