(A) Whenever local authorities in their respective jurisdictions determine on the basis of an engineering and traffic investigation that the speed permitted under this chapter is greater or less than is reasonable and safe under the conditions found to exist upon a highway or part of a highway, the local authority may determine and declare a reasonable and safe limit thereon which:
(1) Decreases the limit at intersection;
(2) Increases the limit within an urban district but not to more than 55 mph during nighttime; or
(3) Decreases the limit outside an urban district, but not to less than 35 mph.
(B) Local authorities in their respective jurisdictions shall determine by an engineering and traffic investigation the proper speed for all arterial streets and shall declare a reasonable and safe limit thereon which may be greater or less than the speed permitted under this chapter for an urban district.
(C) Any altered limit established as herein above authorized shall be effective at all times or during hours of darkness or at other times as may be determined when appropriate signs giving notice thereof are erected upon such street or highway.
(D) Any alteration of speed limits on state highways or extensions thereof in a municipality by local authorities shall not be effective until such alteration has been approved by the Commission.
(Ord. 89, passed 10-14-1969)