Quest'opera è stata rilasciata nel pubblico dominio dal suo autore, Ltljltlj. Questa norma si applica in tutto il mondo. In alcuni paesi questo potrebbe non essere legalmente possibile. In tal caso: Ltljltlj garantisce a chiunque il diritto di utilizzare quest'opera per qualsiasi scopo, senza alcuna condizione, a meno che tali condizioni siano richieste dalla legge.

900 mm by 900 mm (36 in by 36 in) Road Closed 1/2 Mile sign, made to the specifications of the 2004 edition of Standard Highway Signs (sign W20-3). Uses the Roadgeek 2005 fonts copia archiviata 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.