Section 13 AAC 02.280 - Alteration of limits by state and municipalities(a) When the Department of Transportation and Public Facilities with the assistance of the department, or a municipality, in their respective jurisdictions and consistent with AS 28.01.010, determines upon the basis of an engineering and traffic investigation that a maximum speed prescribed in 13 AAC 02.275 is greater or lesser than is reasonable or safe under the conditions found to exist at an intersection, or an arterial street, or at any other place or part of the state or municipal highway system, the respective authority may determine a reasonable and safe maximum limit at the location. The maximum speed limit is effective when signs giving notice of the maximum limit are erected.(b) Alteration of a speed limit under (a) of this section may(1) decrease the limit at an intersection or other place where a full stop is necessary;(2) increase the limit outside of an urban district;(3) increase the limit inside an urban district on controlled access highways;(4) decrease the limit within an urban district to less than 20 miles per hour, except as otherwise provided under AS 28.01.010(b); or(5) decrease the limit outside an urban district.(c) A maximum speed limit may be effective at all times or at times indicated by the signs required by (a) of this section. Limits may be established for different times of day, different types of vehicles, varying weather conditions, and other factors bearing on safe speeds. The limits are effective 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 at variance from the speeds otherwise applicable within the district or at intersections when they erect signs giving notice of the variance.In effect before 7/28/59; am 12/15/61, Register 3; am 8/10/66, Register 22; am 12/31/69, Register 31; am 6/28/79, Register 70; am 8/22/92, Register 123; am 2/27/97, Register 141