Kan. Stat. § 68-2103
In all cases where any municipality or the secretary of transportation shall engage in the making of any improvement on any highway and shall not permit public use of such highway while so engaged, as authorized by K.S.A. 68-2104, and amendments thereto, such municipality or the secretary may construct a detour or establish a detour route and place suitable warning signs near thereto, advising the public of the change in such highway.
In any case where a municipality or the secretary of transportation builds or constructs such a detour, or establishes such a detour route, it shall be the sole duty of such municipality or the secretary to erect barricades and warning signs, which signs shall be located at the entrance to, and exit from, the roadways around the improvement being made, or the entrance to, or exit from, the detour route. When a municipality or the secretary of transportation builds or constructs or provides a detour route at an improvement being made on a highway, all other persons shall be relieved of the obligations imposed by K.S.A. 68-2102, and amendments thereto, upon such other persons in connection with the erection of barricades or warning signs where the performance of the duty would result in a duplication of such barricades or warning signs.
All detours shall be clearly marked at all times, so that the traveling public may be properly advised of the course taken by such detour.
K.S.A. 68-2103