Alaska Administrative Code
Title 13 - Public Safety
Part 1 - Division of Alaska State Troopers
Chapter 03 - Commercial Motor Vehicle and Driving Offenses: Rules of the Road
Article 4 - Speed Restrictions
13 AAC 03.280 - Alteration of limits by state and municipalities

(a) If the Department of Transportation and Public Facilities, with assistance from the department or a municipality in accordance with AS 28.01.010, determines upon the basis of an engineering and traffic investigation that a maximum speed prescribed for a commercial motor vehicle in 13 AAC 03.275(b) is greater or lesser than is reasonable or safe under the conditions found to exist at an intersection, an arterial street, or at any other place or part of the state or municipal highway system, the department or municipality with jurisdiction may determine a reasonable and safe maximum limit at the location. The maximum speed limit is effective when signs identifying the maximum limit are erected.

(b) An alteration of a speed limit under (a) of this section may

(c) A maximum speed limit may be in effect at all times or at the times indicated by the signs required in (a) of this section. A maximum speed limit may be established for different times of day, different types of vehicles, varying weather conditions, or any other factor that has a bearing on safe speed. The maximum speed limit is in effect when posted upon fixed or variable signs.

(d) The Department of Transportation and Public Facilities or a municipality, in their respective jurisdictions, may regulate the timing of traffic signals to permit the movement of traffic in an orderly and safe manner at speeds slightly different from the speeds otherwise applicable within the district or at an intersection if signs are erected notifying drivers of the change in speed limits.