(2) Before any municipal authorities enter into any such formal agreement with the department, such municipal authorities shall comply with all city ordinances or charter provisions pertaining to the closing of streets in the city.
(3) Before the street can be closed or dead-ended, the department shall, after investigation, find and declare by resolution that the closing of the street at the point of intersection is necessary in order to provide safety for the general public or will contribute to a more expeditious and orderly movement of traffic, or both.