ISO 7856:2025
(Main)Intelligent transport systems — Remote support for low speed automated driving systems (RS-LSADS) — Performance requirements, system requirements and performance test procedures
Intelligent transport systems — Remote support for low speed automated driving systems (RS-LSADS) — Performance requirements, system requirements and performance test procedures
This document describes remote support provided to LSADS operated at Level 4 automation on predefined routes by a remotely located human in order to facilitate safe trip continuation. "Remote support" refers to the provision of information, or temporary performance of the dynamic driving task (DDT), and remote monitoring required for these functions. This document is applicable to RS-LSADS in vehicles that provide passenger transport or logistics services on predefined routes. This document specifies: — the terms and definitions related to RS-LSADS and the system architecture of RS-LSADS; — functions of RS-LSADS, which are: remote monitoring, remote assistance and remote driving that is operated under very limited conditions, and conditions under which they need to be activated; — the performance requirements, system requirements and performance test procedures of RS-LSADS; — the data to be communicated between vehicles and the remote support facility (but not protocols or other aspects of communication system). This document is applicable to remote support of operational and tactical functions during continuous operations, but does not apply to strategic functions or to RS-LSADS daily startup or shutdown.
Systèmes de transport intelligents — Téléassistance pour les systèmes de conduite automatisée à basse vitesse (RS-LSADS) — Exigences de performance, exigences du système et procédures d'essai de performance
General Information
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Standards Content (Sample)
International
Standard
ISO 7856
First edition
Intelligent transport systems —
2025-06
Remote support for low speed
automated driving systems
(RS-LSADS) — Performance
requirements, system requirements
and performance test procedures
Systèmes de transport intelligents — Téléassistance pour les
systèmes de conduite automatisée à basse vitesse (RS-LSADS) —
Exigences de performance, exigences du système et procédures
d'essai de performance
Reference number
© ISO 2025
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Published in Switzerland
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Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms. 3
4.1 Symbols .3
4.2 Abbreviated terms .3
5 RS-LSADS architecture . 4
6 Functions of RS-LSADS . 6
6.1 General .6
6.2 Remote monitoring .6
6.3 Remote assistance .6
6.4 Remote driving .6
7 RS-LSADS functional scenarios . 7
7.1 Remote support scenarios .7
7.1.1 Scenario 1: Re-starting after stopping at the bus bay.7
7.1.2 Scenario 2: Entering the unsignalized intersection . .8
7.1.3 Scenario 3: Entering the signalized intersection (signal information only) .9
7.1.4 Scenario 4: Entering the signalized intersection (signal information and both
lateral directions check) .9
7.1.5 Scenario 5: Bypassing obstacles that block the vehicle path .10
7.1.6 Scenario 6: Out of ODD due to environmental conditions .11
8 System requirements .12
8.1 General . 12
8.2 RS-LSADS state transition diagram . 12
8.2.1 State functional descriptions .14
8.2.2 State transition descriptions . 15
9 Communication performance for remote support .16
9.1 General .16
9.2 Latency in remote support . .17
9.3 End-to-end information latency .17
9.4 Information update rate .18
9.5 Distance error due to latency .18
9.6 Communication messages for remote support .19
9.6.1 Vehicle data .19
9.6.2 LSADS data . 20
9.6.3 Driving environment data . 20
9.6.4 Driving environment audio and video information . 20
9.6.5 Passenger status onboard audio and video information . 20
9.6.6 Remote assistance data . 20
9.6.7 Remote driving control data . 20
9.6.8 Infrastructure sensors data . 20
9.6.9 Infrastructure audio and video information . 20
10 RS-LSADS performance requirements .21
10.1 Remote monitoring performance .21
10.1.1 End-to-end communication requirement during remote assistance standby or
remote driving standby .21
10.2 Remote assistance performance .21
10.2.1 Monitoring data for remote assistant .21
10.2.2 Roles of remote assistant .21
iii
10.2.3 Remote assistant response to RFI . 22
10.2.4 Remote assistance HMI, and video field of view and audio . 23
10.2.5 End-to-end communication requirements during remote assistance . 23
10.2.6 Data storage requirements for remote assistance . 23
10.3 Remote driving performance .24
10.3.1 Monitoring data for remote driver .24
10.3.2 Remote driving response to RFD.24
10.3.3 Remote driving HMI, video field of view and audio .24
10.3.4 End-to-end communication requirements during remote driving . 25
10.3.5 Limitations of remote driving . 25
10.3.6 Alert and warning in remote driving . 25
10.3.7 Data storage requirements for remote driving . 25
11 Scenario evaluation test procedures .25
11.1 General . 25
11.2 Test conditions . 26
11.2.1 Subject vehicle conditions . 26
11.2.2 Target vehicle or objects conditions . 26
11.2.3 Environmental conditions . 26
11.2.4 End-to-end communication setup for scenario tests . 26
11.3 Test procedures .27
11.3.1 General .27
11.3.2 Tests for remote assistance .27
11.3.3 Tests for Remote driving .
...
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