§ 39-09-07 — Speed zones on state highways

Whenever the director with respect to highways and the superintendent of the North Dakota
state highway patrol shall jointly determine upon the basis of an engineering and traffic
investigation that the speed of vehicular traffic on a state highway is greater or less than is
reasonable or safe under the conditions found to exist at any intersection or other place or upon
any part of such highway to include streets within the corporate limits of any city, when such
streets have been designated as part of any state highway, said officials acting jointly may
determine and declare a reasonable and safe speed limit thereat not in excess of the maximum
prescribed by law, which shall be effective at all times or during hours of daylight or darkness or
at such other times as may be determined when appropriate signs giving notice thereof are
erected at such intersections or other place or part of the highway.