045-1 Wyo. Code R. § 1-9
(a) The public road agency, if other than WYDOT, shall enter into an agreement with the railroad specifying in detail the duties and responsibilities of all parties involved for design, construction, and future maintenance of detours, warning devices, signals, crossing surfacing systems, and temporary crossings.
(b) Any work covered by standard railroad operating practices that the public road agency requests the railroad to perform, such as railroad flagging and inspection, shall also be covered by a written agreement between the affected parties.
(c) A copy of the fully executed agreement, with plans, shall be filed with the WYDOT Utilities and Railroads Section.
(d) If the Commission initiates a project on its own motion, or if federal funds are used to pay any portion of the costs of the project, the Commission and the affected railroad shall enter into an agreement as required by 23 CFR 646.216.
045-1 Wyo. Code R. § 1-9