Wis. Stat. § 86.135: Railroad highway crossings; traffic control.

All railroad companies, and their officers, agents, and employees, constructing, maintaining, or repairing railroad highway crossings shall comply with the traffic control provisions directed to the safe and expeditious movement of traffic through construction and maintenance zones and to the safety of the work force performing these operations contained in the manual establishing a uniform system of traffic control as adopted by the department under s. 84.02 (4) (e).