The purpose for police not wanting, or disabling, the DRL's is that they do not want to have their visibility increased to other drivers.
In order to increase their ability to earn income for their state, they keep their headlights off.
Emergency lights in state police cars in Indiana are blue and red in most counties in Indiana. These are common colours, not just in Indiana, but throughout the United States and the world!
yes if he has turned on lights in the state he from you stop on other side
The laws vary from state to state. I'm sure some states have laws that prohibit this. They can be pretty blinding during the day as well as night. Here is my common sense view. Never drive with your high beams on, unless it is night and you don't have oncoming traffic. Don't use high beams when it is foggy. Don't use them during the day. My gosh, they make special low power daytime running lights for daytime use. If you don't have these, use your low beams.
It depends on what lights and how near to what type of road. Police are held to the same laws that civilians are and different departments have differents regulations that affect police procedure. Whats a requirement by a city officer may not be by a state officer on the same highway.
Blue lights were first used on a police car in the 1980's. This was in the United States.
It depends on what you mean by police vehicle. A vehicle with blue (or red depending on the locality) lights, a siren, and police markings? No, that would be illegal, at least in my state, and probably all others. In Tennessee, it's illegal to have blue lights or any police insignia on a vehicle unless it's an authorized law enforcement vehicle. You can however, purchase a vehicle with the same engine, suspension, and other specs as a police vehicle. A friend of mine bought a police spec vehicle a couple of years ago with everything except the blue lights and police insignia.
What colored lights are used for what varies by state. Typically, you need a permit to display red or blue lights on your vehicle (and, in some states, green, as well). Red flashing strobes can be used on the back of a vehicle without it being an emergency vehicle, only so long as they flash simultaneously - this is why taillight flasher units which alternate between the brake lights and reverse lamp concurrently on both sides are legal for non-emergency vehicles.
I am not positive about Missouri State laws but in most states it is illegal and considered impersonating an officer.
Try MOTORLIT.COM Some libraries or schools have subscriptions to a database called EBSCO Host which has an Auto Repair Reference Center, think chilton on line. In Montana, the state funds it and all public libraries offer it. Worth getting into, endless diagrams
Conforming to national / state vehicle construction and use laws. If not, you've got a relay stuck
Yes,a state police can investigate a state case.
Maryland State Police was created in 1921.