169.06
Subd. 2. Placement and maintenance on trunk highway. (a) The commissioner shall place
and maintain such traffic-control devices, conforming to the manual and specifications, upon all
state trunk highways as the commissioner shall deem necessary to indicate and to carry out the
provisions of this chapter or to regulate, warn, or guide traffic. The commissioner may construct
and maintain signs at the entrance of each city, which sign shall have placed thereon the name
of the city and the population thereof. The commissioner may construct and maintain other
directional signs upon the trunk highways and such signs shall be uniform. The commissioner
may authorize variations from the manual and specifications for the purpose of investigation and
research into the use and development of traffic control devices. When such authorized variation
pertains to the regulation of traffic, notice of the intended regulatory purpose shall be published in
a qualified newspaper of general circulation in the area where the research is being conducted.
(b) No other authority shall place or maintain any traffic control device upon any highway
under the jurisdiction of the commissioner except by the latter's permission.
Subd. 3. Placement and maintenance by local authority. Local authorities in their
respective jurisdictions shall place and maintain such traffic-control devices upon highways under
their jurisdiction as they may deem necessary to indicate and to carry out the provisions of this
chapter or local traffic ordinances, or to regulate, warn, or guide traffic. All such traffic-control
devices hereafter erected shall conform to the state manual and specifications.