(1) The operator of a vehicle may not make a U-turn upon a highway at any of the following places: (a) At any intersection at which traffic is being controlled by a traffic officer unless instructed by the officer to make a U-turn.(b) In mid-block on any street in a business district, except where the highway is a divided highway and where the U-turn is made at an opening or crossover established by the authority in charge of the maintenance of the highway.(c) In mid-block on any through highway in a residence district, except where the highway is a divided highway and where the U-turn is made at an opening or crossover established by the authority in charge of the maintenance of the highway.(d) At any place where signs prohibiting a U-turn have been erected by the authority in charge of the maintenance of the highway.(e) Upon a curve or upon the approach to or near the crest of a grade on any undivided highway where the vehicle cannot be seen by the driver of any other vehicle within 500 feet approaching from any direction.(f) At any place where a U-turn cannot be made safely or without interfering with other traffic.(1m) The operator of a vehicle shall exercise due care when making a U-turn upon a highway and shall only make a U-turn when the movement can be made safely and without interfering with other traffic.(2) The operator of a vehicle may not back the vehicle at an intersection controlled by an official traffic control device for the purpose of making a U-turn.(3) In this section, "mid-block" means any part of a street or highway other than an intersection.1971 c. 203; 1991 a. 316; 2009 a. 97.