International ISo Standard IS07856 Intelligent transport systems - First edition Remote support for low speed 2025-06 automated driving systems (RS-LSADS) Performance requirements, system requirements and performance test procedures Systemes de transport intelligents - Teléassistance pour les systemes de conduite automatisée a basse vitesse (RS-LSADS) - Exigences de performance, exigences du systeme et procédures d'essai de performance Reference number Is0 7856:2025(en) @ ISO 2025 IS0 7856:2025(en) COPYRIGHT PROTECTED DOCUMENT IS02025 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on or Iso's member body in the countryofthe requester. ISO copyright office CP 40i : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 0111 Email: [email protected] Website: www.iso.org Published in Switzerland @ IS0 2025 - All rights reserved ii IS0 7856:2025(en) Contents Page Foreword. Introduction .vi 1 Scope. 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 7.1 Remote support scenarios 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 Statetransitiondescriptions 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 Remoteassistancedata 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 @ IS0 2025 - All rights reserved ii IS0 7856:2025(en) 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 Testprocedures .27 11.3.1 General. .27 11.3.2 T