ISO 20383:2017 pdf download.Tractors and machinery for agriculture and forestry — Speed Identification Sign (SIS)
1 Scope
This document specifies the dimensions, characteristics, and positioning of Speed Identification Signs (SIS). These signs indicate the maximum equipment ground speed, based on the ground speed design capability, for an agricultural vehicle. A rear-facing SIS is visible to other operators on public roads approaching the equipment from behind. A forward-facing SIS, mounted on the front of towed equipment, alerts operators of the towing vehicle of the maximum specified ground speed capabilities at which the equipment combination can be operated. This document is applicable to self-propelled, semi-integral and towed equipment moving on public roads.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 2810, Paints and varnishes — Natural weathering of coatings — Exposure and assessment
ISO 29862:2007, Self adhesive tapes — Determination of peel adhesion properties
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
3.1 ground speed limitation
<towed equipment combination> specified ground speed of any individual machine which is lowest within a towed implement combination
3.2 implement of husbandry
vehicle or special mobile equipment manufactured, designed, or reconstructed for agricultural purposes and, except for incidental uses, primarily used in the conduct of agricultural operations
Note 1 to entry: Included are agricultural equipment in mounted, semi-mounted or towed configurations that are transported by the mobile equipment.
3.3 public road
<highway> entire width between the boundary lines of every road when any part thereof is subject to public regulation for purposes of vehicular travel
Note 1 to entry: This term includes highways (except limited access highways), county or municipal roads, and lanes.
3.4 specified ground speed
maximum ground speed for which the vehicle, towed or semi mounted equipment has been designed,in its original equipment configuration, giving due consideration to requirements on tire capacity,tracking, stability, braking and other related factors
Note 1 to entry: Specified ground speeds for self-propelled equipment shall be with the largest rolling diameter tires available as original equipment, and at the maximum rated engine speed in the top transmission gear or speed range as specified by the original equipment manufacturer.
3.5 Speed Identification Sign
SIS
sign or emblem, displayed on the equipment or vehicle, used to designate the maximum specified ground speed for which a vehicle or towed machine has been designed to operate
3.6 towed equipment combination
multiple towed machines behind a single towing machine
4 Dimensions
4.1 The SIS shall be circular in shape and 200 mm ± 2 mm in overall diameter as shown in Figure 1.
ISO 20383:2017 pdf download
