A.   The provisions of this title applicable to the drivers of vehicles upon the highways and streets shall apply to the drivers of all vehicles owned or operated by the United States, the state of Idaho or any county, city or any other political subdivision of the state, except as provided in this section and subject to such specific exceptions as are set forth in this title with reference to authorized emergency vehicles.
   B.   Unless specifically made applicable, the provisions of this title shall not apply to persons, teams, motor vehicles and other equipment while actually engaged in work upon the surface of a highway or street but shall apply to such persons and vehicles when traveling to and from such work. (1960 Code, Sec. 7-203)