News & Press Releases

Tuesday, October 22, 2013
Election Season Brings Campaign Signs to Intersections; ACHD Emphasizes Safe Sign Placement

With Election Day three weeks away, Ada County intersections are quickly becoming home to clusters of political campaign signs. The Ada County Highway District (ACHD) cautions candidates and campaigners to be mindful of where signs are placed, particularly at intersections and driveways, to keep visibility clear for motorists, pedestrians and cyclists.

Placing campaign signs in the public right-of-way is permitted in Ada County. However, to ensure safety, ACHD has established guidelines through its sight obstruction policy which outlines where signs can be placed. A 40 foot vision triangle is required to keep signs set back far enough to maintain clear visibility.

A vision triangle is calculated by measuring 40 feet along each intersecting street from the curb or edge of asphalt, and connecting those points by drawing a line to form a triangle. Click here to view a diagram which illustrates the vision triangle.

"ACHD recognizes that visibility of campaign signs is important. However, they need to be placed where they will not cause a safety hazard. What can look acceptable to someone standing next to a sign while installing it, can look entirely different from a driver’s seat point-of-view, and can create an unsafe situation, particularly at intersections and driveways," said Bruce Mills, Deputy Director of Engineering for ACHD.

ACHD’s sight obstruction ordinance governs the District enforcement authority to remove signs that create hazards. ACHD field inspectors will have a special emphasis on identifying signs in violation of the vision triangle and will remove them when necessary. Removed signs will be held at ACHD headquarters in Garden City, where they can be retrieved by a campaign representative.

The public is encouraged to contact ACHD if they observe a sign that is restricting roadway visibility.

The public can call 387-6100 or e-mail during business hours (Monday through Friday 8 a.m. – 4:30 p.m.)

Campaign signs must be removed from the public right-of-way within 48 hours after the election.

For more on ACHD Policy, section 5104.3.1, Ordinance Number 219, please visit and select "Campaign Sign Placement," located under the Quick Links section.


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