scope:

1.1 The scope of this standard is primarily directed to identifying agricultural equipment (implements of husbandry) that has been designed in their original equipment configuration for specified ground speeds. 1.2 The standard applies to self-propelled, semi-integral and towed equipment moving on public roads. 1.3 The Speed Identification Symbol (SIS) identifies the maximum equipment ground speed based on the ground speed design capability of the specified piece of equipment. Requirements for the presence of the SIS may be the subject of various regional standards and/or regulations and in some instances may be prohibited for use. 1.4 The SIS will convey the above information to other operators on public roads approaching from behind the equipment, or for notifying authorities of the equipment's specified ground speed capabilities. 1.5 Mounting of the SIS on the front of towed equipment will serve to alert operators of the towing vehicle of the maximum specified ground speed capabilities at which the equipment combination may be operated.