47-11-803.

§47-11-803.


    A.  Whenever local authorities in their respective jurisdictions
determine on the basis of an engineering and traffic investigation
that the maximum speed permitted under this article 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 maximum limit thereon
which:
    1.  Decreases the limit at intersections; or
    2.  Increases the limit within an urban district, but not to more
than sixty-five (65) miles per hour; or
    3.  Decreases the limit outside an urban district, but not to
less than thirty (30) miles per hour.
    B.  Local authorities in their respective jurisdictions shall
determine by an engineering and traffic investigation the proper
maximum speed for all arterial streets and shall declare a reasonable
and safe maximum limit thereon which may be greater or less than the
maximum speed permitted under Section 1-101 et seq. of this title for
an urban district.
    C.  Any altered limit established as hereinabove 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.  As to streets and highways within the corporate limits which
have been constructed or reconstructed with state or federal funds,
local authorities shall have joint authority with the Transportation
Commission to establish or alter speed limits; provided, however, the
speed limit on an interstate highway within such corporate limits
shall not be decreased to less than sixty (60) miles per hour; and
provided further, that no local authority shall impose speed limits
on any such street or highway substantially lower than those
justified by the highway design, capacity, and traffic volume as
determined by engineering studies.
    E.  Not more than six such alterations as hereinabove authorized
shall be made per mile along a street or highway except in the case
of reduced limits at intersections, and the difference between
adjacent limits shall not be more than ten (10) miles per hour.