Are U-Turn Signs required at traffic lights in the state of Wisconsin?

Question

I have been doing some research and have found that it is illegal to make a U-turn at a controlled intersection in the state of wisconsin, but I also noticed that there are no U-Turn signs displayed at them. Are these signs required, and if they are not, why are they displayed at the intersections? This pertains to a illegal U-turn ticket if anyone is curious.

Answer 1

The signs are not required as it is a statute.  The way I read the below statute, mid block U-turns in residential districts are also unlawful.  So essentially no U-turns anywhere.  

346.33 Where turns prohibited, exception. (1) The operator of a vehicle shall not turn the vehicle so as to proceed in the opposite direction upon a highway at any of the following places:

(a) At any intersection at which traffic is being controlled by traffic control signals or by a traffic officer;

(b) In mid−block on any street in a business district, except where the highway is a divided highway and where the 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 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 such turn have been erected by the authority in charge of the maintenance of the highway.

(3) In this section, “mid−block” means any part of a street or highway other than an intersection.

(22) “Highway” means all public ways and thoroughfares and bridges on the same. It includes the entire width between the boundary lines of every way open to the use of the public as a matter of right for the purposes of vehicular travel. It includes those roads or driveways in the state, county or municipal parks and in state forests which have been opened to the use of the public for the purpose of vehicular travel and roads or driveways upon the grounds of public schools, as defined in s. 115.01 (1), and institutions under the jurisdiction of the county board of supervisors, but does not include private roads or driveways as defined in sub. (46).

(64) “Street” means every highway within the corporate limits of a city or village except alleys.

(50) “Residence district” means the territory contiguous to a highway not comprising a business district where the frontage on such highway for a distance of 300 feet or more is mainly occupied by dwellings or by dwellings and buildings in use for business.

(6) “Business district” means the territory contiguous to a highway when 50 per cent or more of the frontage thereon for a distance of 300 feet or more is occupied by buildings in use for business.

Answer 2

No. U-Turn signs are not required at traffic lights.

Wisconsin only allows U-Turns midblock in residential districts.

Answer 3

.   I guess they figure that "Ignorance is no defense" and they have too many signs cluttering up the roadways already.  They are not required.