Originally Posted by lesptr
California is the only state in which Iíve seen this sign.
In Washington you will see
Speed Limit 65
Washington law considers any vehicle over 10,000lbs gross, or any vehicle in combination (except "auto stages, which is apparently a fancy name for "bus") to be a "truck" for the purpose of speed limits.
Those same vehicles are also not permitted to be in the leftmost lane of any road with 3 or more lanes in the same direction at all, unless preparing to make a legal left turn.