This file and its description are from Wikimedia Commons.
Summary
DescriptionSHSM truck.svg
English: A silhouette of the left side of a two-axle, single-unit truck, used as a symbol on the Weight Limit symbol sign (R12-5) defined in the Manual on Uniform Traffic Control Devices.
Date
Source
"Appendix" in Standard Highway Signs and Markings (PDF), Federal Highway Administration
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.
Captions
silhouette of the left side of a two-axle, single-unit truck