Which of the following best describes a pilot car's role?

A pilot car, often referred to as a escort vehicle, has a critical role in assisting oversized vehicles, which may not be able to navigate standard roadways safely. These oversized vehicles can include trucks carrying large loads or equipment that exceed the normal size limits set by traffic regulations.

The primary responsibility of a pilot car is to lead the oversized vehicle through traffic, ensuring that the route is clear and that other drivers are aware of the presence of the wide or tall load. The pilot car typically has a visible warning sign and hazard lights to alert other road users. This function is essential for maintaining safety, as it helps prevent accidents that may arise from the difficulties oversized vehicles face when maneuvering on roads.

The other options relate to activities that are not typically within the scope of a pilot car's duties, such as providing repair assistance, monitoring fuel consumption, or assisting passengers during vehicle breakdowns, which do not pertain to the core function of leading and navigating oversized loads safely through traffic.