Section 39.03.60.301 - STANDARDS FOR DIRECTIONAL SIGNS01.Prohibited Directional Signs. The following directional signs are prohibited: a. Signs advertising activities that are illegal under federal or state laws or regulations in effect at the location of those signs or at the location of those activities.b. Signs located in such a manner as to obscure or otherwise interfere with the effectiveness of an official traffic sign, signal, or device, or obstruct or interfere with the driver's view of approaching, merging, or intersecting traffic.c. Signs which are erected or maintained upon trees or painted or drawn upon rocks or other natural features.d. Signs which are structurally unsafe or in disrepair.e. Signs which move or have any animated or moving parts.f. Signs located in rest areas, parklands, or scenic areas.g. Signs that advertise or call attention to an activity or attraction no longer in existence and/or abandoned or obsolete signs.h. Signs not maintained in a neat, clean, and attractive condition or in good repair.i. Signs not designed to withstand a wind pressure of thirty (30) pounds per square foot of exposed surface.j. A sign installation that has not been issued an annual permit.02.Size of Directional Signs. a. Signs shall not exceed the following limits: Maximum area, one hundred and fifty (150) square feet; maximum height twenty (20) feet; maximum length, twenty (20) feet.b. All dimensions include border and trim, but exclude supports.03.Spacing of Directional Signs.a. Each location of a sign must be approved by the department and the property owner on whose property the sign is installed.b. A sign may not be located within two thousand (2,000) feet of an interchange, along the interstate system or other freeways (measured along the interstate or freeway from the nearest point of the beginning or ending of pavement widening at the exit from or entrance to the main traveled way), or located within one thousand (1,000) feet of an intersection of a primary route with another designated federal-aid route.c. A sign may not be located within two thousand (2,000) feet of a rest area, park land, or scenic area.d. A sign shall not be located within one (1) mile of any other directional sign facing the same direction of travel.e. Not more than three (3) signs pertaining to the same activity and facing the same direction of travel may be erected along a single route approaching the activity.f. Signs located adjacent to the interstate system shall be within seventy-five (75) air miles of the activity.g. Signs located adjacent to the primary system shall be within fifty (50) air miles of the activity.04.Message Content. The message on directional signs shall be limited to the identification of the attraction or activity and directional information useful to the traveler in locating the attraction, such as mileage, route numbers, or exit numbers. Descriptive words or phrases and pictorial or photographic representations of the activity or its environs are prohibited.Idaho Admin. Code r. 39.03.60.301