The following additional policies shall be observed in establishing and posting speed zones.
(A) Normally, isolated curves and turns, areas of restricted sight distance, no passing zones and the like will not be considered as areas for speed zones. Advisory speed signs may be used in connection with the appropriate warning signs at such locations, and such condition shall not be considered as influencing a lower limit for the entire zone.
(B) Except on divided highways, different speeds for traffic in opposite directions shall not be posted.
(C) A speed zone shall begin at the point or as near in advance of the point as possible where such speed zone is warranted and shall end at the point or as near to the point as possible where the zone is not warranted.
(D) Minimum speed limits, when used, shall provide for an allowable speed range of not less than ten mph nor more than 15 mph,. No minimum speed of less than 30 mph shall be used.
(E) No sign in the speed limit series (R2) shall be mounted on the same post as another sign, except that the basic speed limit sign (R2-1) may be mounted below the town name sign (I1-1100 or I1-1101) or county route marker sign (M1-5).
(Res. passed 3-13-2007)