ISO/PAS 23735:2025
Road vehicles — Ergonomic design guidance for external visual communication from automated vehicles to other road users
Road vehicles — Ergonomic design guidance for external visual communication from automated vehicles to other road users
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 58
- Дата публикации:
- 25 марта 2025 г.
- Издание:
- ISO PAS 23735 edition 1 version 1
- ICS:
- 13.180
The scope of this document encompasses design parameters of external visual communication used by single mode L4/L5 automated driving system-dedicated vehicles (ADS-DVs), as defined in SAE J3016. Guidance is given for passenger cars (including sport utility vehicles and light trucks) and commercial vehicles (including heavy trucks and buses), as well as derivatives of them that carry or do not carry compartments for occupants (i.e. driver or passengers). These vehicles can be operated in different domains, covering several alternative scenarios and use cases (e.g. open roads, motorways, urban environments, confined areas, geo-fenced areas with dedicated lanes, ports, terminals, pits). It is assumed that the design of ADS-DVs will be unique, thus making it readily apparent that the vehicle is an ADS-DV (see also Annex A for descriptions of use cases concerning the need for communication). The wide range of domains makes it important to consider users with different experiences and abilities, e.g. experienced and inexperienced drivers, elderly, people with disabilities and children.
Abstract
Overview
ISO/PAS 23735:2025 - "Road vehicles - Ergonomic design guidance for external visual communication from automated vehicles to other road users" provides human-factors guidance for designing external visual communication on single‑mode L4/L5 automated driving system‑dedicated vehicles (ADS‑DVs). The Publicly Available Specification covers passenger cars, SUVs, light trucks, heavy trucks and buses (and their derivatives) operating across multiple domains (open roads, motorways, urban environments, geo‑fenced lanes, ports, terminals and confined areas). The document emphasizes ergonomics, accessibility and the need to make ADS‑DVs recognizably automated while addressing diverse road users (pedestrians, cyclists, motorcyclists, drivers, elderly people, children and people with disabilities).
Key topics and technical focus
ISO/PAS 23735 does not set numeric mandates but gives structured design guidance across these technical areas:
- Framework for interaction between ADS‑DVs and other road users: encounters, interactions and conflict situations.
- Communication channels: explicit vs implicit signalling and how visual signals integrate with natural vehicle motion and other cues.
- Expectation management: how different road users perceive, comprehend and respond to external visual messages.
- Developing a communication language: message content, protocols, media allocation, learnability and addressability.
- Visual attributes and implementation: presentation style, message location on the vehicle, viewing angles, colour, brightness, and coordination with vehicle motion and existing vehicle signals.
- Integration and evaluation: choreography with existing systems, human‑factors testing and methods for evaluating effectiveness.
- Accessibility, demographic and cultural considerations: design for age differences, disabilities and regional expectations.
- Supporting materials: informative Annex A (use cases needing communication) and Annex B (multiple resource theory).
Practical applications
ISO/PAS 23735 is practical guidance for:
- Designing external light displays, pictograms and dynamic message surfaces on AVs.
- Defining human‑centred UX for AV fleet deployments in urban, motorway and confined domains.
- Creating test protocols and validation plans for vehicle–road‑user interactions.
- Informing procurement, deployment policies and signage integration for dedicated automated vehicle zones.
Who should use this standard
- Automotive OEMs and AV system integrators
- Human factors / ergonomics and UX designers
- Vehicle lighting and display engineers
- Regulators, transport planners and fleet operators
- Researchers and test houses evaluating AV road‑user communication
Related standards
- SAE J3016 (definition of L4/L5 ADS terminology) - referenced in the scope
- AVAS concepts and vehicle lighting/signal standards (for multimodal integration)
Keywords: ISO/PAS 23735, external visual communication, automated vehicles, ADS‑DV, L4, L5, ergonomic design, road users, visual signals, vehicle UX.
Технические детали
- Технический комитет
- ISO/TC 22/SC 39 - Ergonomics
- SKU
- ISO/PAS 23735:2025
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