Coloured Lights Tell Us Something About Vehicles
The lights that our vehicles are equipped with serve two important functions. They allow us to see and they allow us to be seen by other road users. The messages conveyed to others by our vehicle's lights must be clear with no opportunity for confusion. This convention is followed worldwide.

There sometimes seem to be two types of people when it comes to the sounds emitted by their vehicle's mufflers: those who hate it and those who try to balance calling attention to themselves yet not provoke a response from traffic law enforcement.
The next time you get into your vehicle, start it up, set the parking brake, turn on all of the lights and the hazard flashers. Walk around your vehicle and check all the lights. Are they all lit as they should be, and are the lenses clean, intact and still the right colour? If so, you are good to go from the standpoint of lights at least.
Question: I bought a used newer truck from a dealership and was told prior to signing the final documents that the truck had gone through a full safety inspection. Less than two weeks later I was pulled over and issued a ticket for improperly equipped motor vehicle and issued a box 2 inspection order for my 2017 Dodge Ram 3500.