In a funeral procession, what light conditions must vehicles adhere to?

In a funeral procession, vehicles are required to use both flashing hazard lights and headlights to increase visibility and ensure safety during the event. This practice serves several important purposes: it alerts other drivers to the procession, indicating that they should yield to and respect the solemnity of the occasion. The use of headlights helps to further enhance visibility, especially if the procession occurs in low-light conditions such as early morning or late evening.

By employing both flashing hazard lights and headlights, vehicles in the procession can effectively communicate to other road users that they are part of a ceremonial event and may be traveling at a slower pace. This enhances safety for everyone involved. In contrast, the other options would not provide adequate visibility or communication to surrounding drivers, which could lead to dangerous situations during the procession.