Section 66.1037 - Beautification and protection(1) No lands abutting on any highway, and acquired or held for highway purposes, shall be deemed discontinued for such purposes so long as they abut on any highway. All lands acquired for highway purposes after June 23, 1931, may be used for any purpose that the public authority in control of the highway determines promotes the public use and enjoyment. The authority may improve such lands by suitable planting, to prevent the erosion of the soil, or to beautify the highway. The right to protect and to plant vegetation in any highway laid out prior to June 23, 1931, may be acquired in any manner that lands may be acquired for highway purposes. Subject to sub. (2), it shall be unlawful for any person to injure any tree or shrub, or cut or trim any vegetation other than grass, or make any excavation in any highway laid out after June 23, 1931, or where the right to protect vegetation has been acquired, without the consent of the highway authority and under its direction. The authority shall remove, cut, or trim or consent to the removing, cutting, or trimming of any tree, shrub, or vegetation in order to provide safety to users of the highway.(2)(a) Except as provided in par. (b), no person may cut or trim grass along any state trunk highway without the consent of the department of transportation.(b) A person who owns or leases land abutting a state trunk highway may, without the consent of the department of transportation, cut or trim grass that is within the highway right-of-way and that is located along the land's frontage with the highway right-of-way or within 200 feet of a driveway, railroad crossing, or intersection along the land's frontage with the highway right-of-way. This paragraph does not permit a person to cut or trim grass without the consent of the department of transportation if any of the following applies: 1. The state trunk highway is a freeway, as defined in s. 346.57(1) (am), or an expressway, as defined in s. 59.84(1) (b).2. The person farms or harvests the grass.3. The grass is located in any of the following:a. An area where pedestrians are prohibited.b. An area accessible only by crossing a traffic lane of the state trunk highway.c. An area located within 50 feet of a sign, as defined in s. 84.30(2) (j).2003 a. 214 ss. 23m to 24g.2003 Wis. Act 214, which affected this section, contains extensive explanatory notes.
Municipalities may incur liability for failure to trim vegetation obstructing the view at an intersection. Walker v. Bignell, 100 Wis. 2d 256, 301 N.W.2d 447 (1981). Although this section mandates that governmental authorities "remove, cut or trim or consent to the removing, cutting or removal of any tree, shrub or vegetation in order to provide safety to users of the highway," it has not also created a private cause of action for damages caused by a failure to comply with that mandate. Estate of Wagoner v. City of Milwaukee, 2001 WI App 292, 249 Wis. 2d 306, 638 N.W.2d 382, 01-0623.