Minn. Statute 169.14 establishes statutory speed limits on most typical roadways under ideal conditions. All other speed limits are set by the DOT Commissioner based upon an engineering and traffic investigation. These factors are considered:
Road type and condition
Location and type of access points (intersections, entrances, etc.)
Sufficient length of roadway (1/4 mile minimum)
Existing traffic control devices (sign, signals, etc.)
Crash history traffic volume sight distances (curve, hill, etc.)
This black and white sign shows the maximum speed that a motorist may travel under ideal conditions. It can be a statutory value or else it must be authorized by the commissioner of transportation. See regulatory speed limit sign standards.
Advisory speed limits
This black and yellow speed sign is used to advise motorists of a comfortable speed to navigate certain situations. It is used with a warning sign. For instance, when traveling on a winding road, the curve warning sign would be used with an advisory speed sign. This sign may be posted by the local road authority on local roads. See advisory speed limit sign standards.