What is true of vehicles in a funeral procession?

Vehicles in a funeral procession are typically granted the right-of-way when they are being led by an escort vehicle, which often has flashing lights or other identifying features. This allows the procession to move through intersections without stopping, helping to minimize disruption during a sensitive time and ensuring safety for the participants. The escort vehicle is there to signal to other road users that a solemn event is taking place, and it helps facilitate the movement of the entire procession safely and respectfully.

The other options provided do not reflect the regulations that apply to funeral processions. For instance, requiring vehicles to stop at all intersections would effectively hinder the procession, often contrary to their right-of-way. Turning off headlights is not a standard requirement and would make the vehicles less visible, posing safety risks. Additionally, the stipulation about only proceeding through intersections with a yellow light does not apply, as procession vehicles often operate under the special privileges afforded by their escort.