SMV Slow Moving Steel Vehicle SignOne New Aftermarket Replacement SMV Slow Moving Vehicle Sign Metal, Type 1 This metal SMV (Slow Moving Vehicle) emblem is a required safety sign for any tractor, combine, mower, or other farm or construction equipment traveling on public roads at speeds under 25 mph. The fluorescent orange triangle with reflective red border provides maximum visibility to oncoming traffic day and night, meeting all federal and ASAE ANSI standards for slow moving