SOURCE-LINKED REGULATION GUIDE
UN R89 — Speed-limitation systems
Distinguish fixed and adjustable speed-limitation functions.
Explore the scopeWhat does it cover?
UN R89 separately addresses vehicle speed limitation, installation of an approved speed limiter and approval of the limiting device. It distinguishes systems that restrict maximum speed from adjustable functions that operate at a value selected by the driver.
Who is it for?
Commercial-vehicle and control-system makers and homologation teams.
Which subjects are addressed?
- Vehicle speed limitation
- Device approval
- Installation approval
- Adjustable speed limitation
Common question
What does adjustable speed limitation mean?
When activated, the function limits speed to a value chosen by the driver. Fixed maximum-speed limitation is defined separately.
Source documents and references
Work with this regulation in RegsUP.
Read the text with its edition and sources. Assess available comparisons, relevant dates and question-and-answer features against your work needs.
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