Plik:US 340.svgDescriptionUS 340.svg English: 750 mm × 600 mm (30 in × 24 in) U.S. Highway shield, made to the specifications of the 2004 edition of Standard Highway
Plik:US 340 (1948).svgDescriptionUS 340 (1948).svg 1948 style US Route 340 highway marker Date 7 January 2011, 16:37 (UTC) Source File:US XX (1948).svg Author Fredddie, Levente
Plik:US 340 (1961).svgDescriptionUS 340 (1961).svg 1961 style US Route 340 highway marker Date 13 December 2010, 07:17 (UTC) Source File:US XX 1961.svg Author Fredddie, Scott
Plik:US 340 (1926).svgDescriptionUS 340 (1926).svg Generic U.S. Highway marker, labeled for city use, from the First Edition of the Manual and Specifications for the Manufacture