If the officer is directing traffic, regardless of the sign or signal, the officer's signals take precedence.
No, usually not. Ordinarily, Traffic Officers are not Police Officers-- although they can be in some jurisdictions. In most jurisdictions, some people who are Traffic Officers choose to advance themselves by becoming Police Officers, but this is not a necessary pursuit. The majority of Traffic Officers probably remain with that force for many years.
Police officers giving traffic signals.
Yes.
Under routine conditions, police officers EVERYWHERE, must drive in accordance with traffic regulations. There are exceptions for officers when they are operating in emergency conditions but they must always drive with due caution to the general public.
It depends on where you are and exactly what you mean. In the U.S. within any given department there are patrol officers, traffic officers, adminstrative officers, Tac team or SWAT officers, supervisors, detectives, etc. Then there are city officers, county officers, state troopers, DEA, FBI, CIA, post office police, school police (some schools use fully commissioned police officers), special ops (tact team, SWAT team, etc).
Yes they are police officers.
You must always follow traffic instruction by a police officer on the road regardless of automated traffic signals, signs, or traffic rules.
No. Auxiliary police officers are not officers of the court.
Internal Affairs, or other police officers specifically assigned to do just that Police the Police, while many think this is a conflict of interest it really isn't as the officers assigned to this unit will usually do anything to convict a Police Officer who is charged with a crime, so it is a common misconception that IA doesn't do anything when in reality they do so much to keep Police clean
According to the Sourcebook of Criminal Justice Statistics, 309 law enforcement officers were feloniously killed while making traffic stops between 1979 and 2008. See below link:
Unless you are referring to uniformed civilian members of the Parking Enforcement or Traffic Aide units, all sworn POLICE officers have the same legal responsibilities. While some police units DO have specialized assignments their one major goal and responsibility is the enforcement of ALL the laws.
It depends on where they are. In the U.S. very generally speaking, police officers enforce laws, investigate crime, serve warrants, answer emergency calls, and write traffic tickets.