SOURCE-LINKED REGULATION GUIDE
UN R139 — Brake assist systems
Assess BAS separately from the basic braking approval.
Explore the scopeWhat does it cover?
UN R139 concerns approval of M1 and N1 vehicles with regard to brake assist systems (BAS). It contains general and functional requirements and test conditions. Vehicles with a design speed of no more than 25 km/h and certain vehicles adapted for drivers with special needs are excluded.
Who is it for?
Brake-system manufacturers and vehicle-control software and dynamic-testing teams.
Which subjects are addressed?
- BAS approval
- Functional requirements
- General test conditions
- Scope exclusions
Common question
Is BAS assessed under the same text as basic braking?
No. R139 specifically addresses brake assist. Basic braking and other related control systems must be considered under their own scopes.
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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