Commission Delegated Regulation (EU) 2021/1958
Commission Delegated Regulation (EU) 2021/1958 supplementing Regulation (EU) 2019/2144 by laying down detailed rules concerning the specific test procedures and technical requirements for the type-approval of motor vehicles with regard to their intelligent speed assistance systems
| Issuing body | EC |
|---|---|
| Committees | European Commission |
| First issued | 2021 |
| Latest revision | 2021 |
| Status | active |
| Category | regional |
| Topics | adas_effectiveness, auditory_warnings, multimodal_feedback, sign_visibility_legibility |
| Reference | https://eur-lex.europa.eu/eli/reg_del/2021/1958/oj/eng |
Scope
Sets the test procedures and technical requirements for intelligent speed assistance (ISA) under GSR2. An ISA system must comprise a speed limit information function (SLIF) plus either a speed limit warning function (SLWF) or a speed control function (SCF). Permits several driver-warning configurations — visual plus cascaded audible, visual plus cascaded haptic, or purely haptic. SLIF accuracy is verified by a 400 km on-road test across urban, non-urban and motorway roads, requiring correct speed-limit determination over at least 90% of the distance. The driver may always override or switch the system off.
Related Papers (20)
- A Holistic Inquiry of Intelligent Speed-Assist Technology: Safety Impacts, Technology Implementation, and Challenges · 2025 · paper relates to standard · 0.76 (embedding)
- What benefit does Intelligent Speed Adaptation deliver: A close examination of its effect on vehicle speeds ↗ · 2012 · paper relates to standard · 0.75 (embedding)
- A Holistic Inquiry of Intelligent Speed-Assist Technology: Safety Impacts, Technology Implementation, and Challenges [Research Brief] · 2023 · paper relates to standard · 0.75 (embedding)
- Intelligent Speed Adaptation—The Next Generation of Traffic Management Tools ↗ · 2011 · paper relates to standard · 0.75 (embedding)
- Development of a Novel Intelligent Speed Adaptation System Based on Available Sight Distance · 2021 · paper relates to standard · 0.75 (embedding)
- Improving speed behaviour: the potential of in-car speed assistance and speed limit credibility ↗ · 2008 · paper relates to standard · 0.72 (embedding)
- An Integrated and Multidisciplinary Approach for Studying Use and Acceptance of New Driver Support System: The French National Project on Intelligent Speed Adaptation (LAVIA Project) ↗ · 2011 · paper relates to standard · 0.71 (embedding)
- Driver behaviour models for a driving simulator-based intelligent speed adaptation system ↗ · 2009 · paper relates to standard · 0.71 (embedding)
- Adapting V ISA Technology: Driver Behaviour along Interchange Ramp and Merging/Diverging Terminals ↗ · 2023 · paper relates to standard · 0.70 (embedding)
- Evaluating the effectiveness of a smartphone speed limit advisory application: An on-road study in Port-Harcourt, Nigeria ↗ · 2021 · paper relates to standard · 0.70 (embedding)
- An integrated intelligent speed adaptation system for enhanced driver assistance, driving performance and safety ↗ · 2025 · paper relates to standard · 0.69 (embedding)
- The effectiveness of an advisory Intelligent Speed Adaptation (ISA) system for Victorian repeat speeders ↗ · 2014 · paper relates to standard · 0.69 (embedding)
- Effects of Human–Machine Interface Design for Intelligent Speed Adaptation on Driving Behavior and Acceptance ↗ · 2005 · paper relates to standard · 0.69 (embedding)
- Potential for in-car speed assistance systems: results of a large-scale survey in Belgium and the Netherlands ↗ · 2011 · paper relates to standard · 0.69 (embedding)
- Driver acceptance of mandatory intelligent speed adaptation ↗ · 2005 · paper relates to standard · 0.68 (embedding)
- Evaluation of in-vehicle dynamic speed assistance in Spain: algorithm and driver behaviour ↗ · 2008 · paper relates to standard · 0.67 (embedding)
- Draft Research Test Procedure Performability Assessment for Five ADAS Variants · 2021 · paper relates to standard · 0.66 (embedding)
- Technical Feasibility of Advanced Driver Assistance Systems (ADAS) for Road Traffic Safety · 2005 · paper relates to standard · 0.66 (embedding)
- The challenge of ADAS assessment: A scale for the assessment of the HMI of advanced driver assistance technology · 2018 · paper relates to standard · 0.66 (embedding)
- Could Intelligent Speed Adaptation make overtaking unsafe? ↗ · 2012 · paper relates to standard · 0.66 (embedding)