When are flashing amber lights required for slow-moving vehicles?

Flashing amber lights are required for slow-moving vehicles to alert other road users of their presence and the potential for reduced speed ahead. This requirement helps to increase visibility and safety on the road, particularly when a vehicle is moving slower than the normal traffic flow, which is generally considered to be less than 25 mph.

Using the flashing amber lights when lights are required to be used ensures that these vehicles are clearly noticed, especially in conditions where visibility may be compromised, such as poor lighting or inclement weather. The other scenarios, such as being parked on the side of the road, only during the night, or when driving over 25 mph, do not pertain to the specific regulations regarding the use of flashing amber lights for slow-moving vehicles. The rules specifically establish that these lights are meant to be activated under circumstances where the vehicle's speed and potential hazards need to be communicated to other drivers effectively to promote safety.