Euro NCAP's Safety Assist protocols, on paper: the document set listed under Latest and the archived version history

Euro NCAP's star ratings rest on several assessment areas, and the one covering driver-assistance and collision-avoidance technology is called Safety Assist. The organization's methodology is not a single rulebook but a set of separate protocol documents, each with its own version number and its own entry in an archive of earlier editions. What follows is a look at that document set as Euro NCAP itself names, numbers and archives it on its Safety Assist protocols page — a paper-level reference to the listed protocols, not a summary of individual test procedures.

On its Safety Assist protocols page, as read on 28 September 2026, Euro NCAP lists five documents under "Latest": Assessment Protocol - SA - Safe Driving v10.4, Assessment Protocol - SA - Collision Avoidance v10.4.1, AEB Car-to-Car Test Protocol v4.3.1, LSS Test Protocol v4.3 and SAS Test Protocol v2.0. Each document on that listing carries its own version designation rather than sharing one umbrella version number with the others.

Two assessment protocols, three test protocols

The five documents listed under "Latest" on 28 September 2026 fall into two visibly different naming patterns. Two are "Assessment Protocol - SA" documents — Safe Driving v10.4 and Collision Avoidance v10.4.1 — while three are dedicated test protocols: AEB Car-to-Car v4.3.1, LSS (Lane Support Systems) v4.3 and SAS v2.0. The numbering shows they are numbered independently of one another: the assessment protocols have reached the v10 series while the AEB Car-to-Car document is in its fourth major version and SAS in its second.

The version history the page shows

Beyond the "Latest" list, the same page keeps a "Previous" section that archives earlier editions of each protocol line. For AEB Car-to-Car, that archive lists, from the most recent entry backwards, v4.3, v4.2, v3.0.3, v3.0.2, a v2.0.1 "AEB C2C Test Protocol" document and two "AEB Test Protocol" editions numbered v1.1 and v1.0. The lane-support line runs from an early "Lane Support Systems v.1.0" through LSS v2.0.1, v2.0.2, v3.0.2 and v4.2 up to the listed v4.3. SAS has two predecessors, v1.0 and v1.1, before the listed v2.0.

The assessment protocol side has its own depth of history on the same archive. Alongside the split "Assessment Protocol - SA - Safe Driving" editions at v10.3 and v10.2 and "Assessment Protocol - SA - Collision Avoidance" editions at v10.4 and v10.3, the archive keeps a combined "Assessment Protocol - SA" line through v9.1, v9.0.4, v9.0.3, v8.0.4, v8.0.2, v7.0, v6.1, v6.0 and v5.6. One older standalone document, ESC Test Protocol v1.2, also appears in the archive alongside them.

Why the version numbers matter

The archive shows a methodology that has been revised through many numbered editions rather than a single static document set. A published Safety Assist result is tied to the document set as it stood when the assessment was made, so the version of the protocol is part of the context in which that result should be read, in the same way the crash-test protocols are.

How to check the listing yourself

The listing itself is public. To check it against what this piece reports:
- Go to euroncap.com and open the Protocols section, then the Safety Assist page.
- Under "Latest" you will find the five documents listed with their full version designations, as the page showed on 28 September 2026.
- Under "Previous" you will find the archived earlier editions of each protocol, back to the v1.x era for AEB and the pre-split Assessment Protocol - SA line.
- Quote any document by its exact title and version number, as Euro NCAP itself prints them.
- Confirm on the live page before relying on any version listed here, since the listing may have been updated since the page was read.