Okla. Stat. tit. 47, § 47-1148

The local authorities of cities and towns of this state shall

have no power to pass, enforce, or maintain any ordinances, rules,

or regulations requiring from any owner to whom this act is

applicable any tax, fee, license, or permit for the free use of the

public highways or excluding or prohibiting any vehicle registered

in compliance with this act or the accessories used thereon from the

free use of the public highways, and no ordinance, rule, or

regulation in any way contrary to or inconsistent with the

provisions of this act, now in force or hereafter enacted, shall

have any force or effect. The powers given to local authorities in

municipalities to enact general rules and ordinances applicable

equally to all vehicles upon certain streets in such cities where

the traffic is heavy and continuous and the powers given local

authorities to regulate vehicles offered to the public for hire or

for processions, assemblages, or parades in the streets or public

places shall remain in full force and effect. Local authorities may

set aside a specified public highway or highways for speed contests

or races to be given under proper restrictions for the safety of the

public and may exclude by ordinance orregulation vehicles used

exclusively for commercial purposes from the parks and parkways of

this state, provided such ordinance or regulation is applicable

equally and generally to all other vehicles used for the same

purpose. The local authorities may exclude vehicles from any

cemetery or ground used for burial of the dead. Cities and towns

may regulate the speed of vehicles within their corporate limits;

and that 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. 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. A municipality may issue licenses authorizing the parking

or unloading of vehicles in zones on streets restricted for loading,

unloading or commercial use.