Whenever pursuing a person in violation of a traffic related offense, a uniformed law enforcement officer who is assigned routinely or primarily to traffic law enforcement or other traffic safety duties on the roadways or highways of this state must place a visible blue light on the roof of his or her vehicle if such vehicle is not equipped with permanent roof mount blue lights; provided, however, that the provisions of this Code section shall not apply to law enforcement officers operating vehicles manufactured prior to 2001. This Code section shall not apply to any officer assigned to special operations activities or responding to an immediate threat to public safety as a result of an accident or other emergency. An otherwise lawful arrest shall not be invalidated or in any manner affected by failure to comply with this Code section.