Este trabajo ha sido liberado al dominio público por su autor, Ltljltlj. Esto aplica para todo el mundo. En algunos países esto puede no ser legalmente factible; si ello ocurriese: Ltljltlj otorga a cualquier persona el derecho de usar este trabajo para cualquier propósito, sin ningún tipo de condición, a menos que éstas sean requeridas por la ley.

900 mm by 900 mm (36 in by 36 in) Road Closed Ahead sign, made to the specifications of the 2004 edition of Standard Highway Signs (sign W20-3). Uses the Roadgeek 2005 fonts archive copy at the Wayback Machine. (United States law does not permit the copyrighting of typeface designs, and the fonts are meant to be copies of a U.S. Government-produced work anyway.) Colors are from [1] (Pantone Orange 152), converted to RGB by [2].

This file is in the public domain because it comes from the Manual on Uniform Traffic Control Devices, sign number W20-3, which states specifically on page I-1 that: Any traffic control device design or application provision contained in this Manual shall be considered to be in the public domain. Traffic control devices contained in this Manual shall not be protected by a patent, trademark, or copyright, except for the Interstate Shield and any other items owned by FHWA.