Nebraska Revised Statute 39-201.01
(1) Highway Beautification Control System means the National System of Interstate and Defense Highways, the system of federal-aid primary roads as they existed on June 1, 1991, any additional highway or road which is designated as a part of the National Highway System under the federal Intermodal Surface Transportation Efficiency Act, and scenic byways. A map of the Highway Beautification Control System shall be maintained as provided in section 39-1311;
(3) Visible, in reference to advertising signs, displays, or devices, means the message or advertising content of such sign, display, or device is capable of being seen without visual aid by a person of normal visual acuity. A sign is considered visible even though the message or advertising content can be seen but not read.