Indicates traffic in this lane cannot turn

 

This W3C-unspecified vector image was created with Inkscape .

600 mm by 750 mm (24 in by 30 in) Mandatory Straight Only sign, made to the specifications of the 2004 edition of Standard Highway Signs (sign R3-5). 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.) The outside border has a width of 1 (1 mm) and a color of black so it shows up; in reality, signs have no outside border.

This file is in the public domain because it comes from the Manual on Uniform Traffic Control Devices, sign number R3-5a, 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.