ISO INTERNATIONAL STANDARD 22951 First edition 2009-01-15 Data dictionary and message sets for preemption and prioritization signal systems for emergency and public transport vehicles (PRESTO) Dictionnaire de données et ensembles de messages pour la preemption et la priorisation des systemes de signaux pour les vehicules d'urgence et detransportpublic (PRESTO) Reference number ISO 22951:2009(E) @ ISO 2009 oyIHSunder nse from IHS Not for Resale ISO22951:2009(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHTPROTECTEDDOCUMENT @ ISO2009 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either isO at the address below or IsO's memberbody in the country of the requester. ISO copyright office Case postale 56.CH-1211Geneva 20 Tel. + 4122 749 01 11 Fax + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland @ Iso 2009 - All rights reserved I without license from IHS Not for Resale ISO 22951:2009(E) Contents Page Foreword. Introduction. 1 Scope 2 Normative references.. 2 3 Terms and definitions.. 4 Symbols and abbreviated terms 5 Data dictionary and message sets for PRESTO 5.1 Data dictionary.. 5.2 Message sets.. Annex A (informative) The concept of PRESTO.. Annex B (informative) PRESTO architecture Annex C (normative) PRESTO requirements list. Annex D (informative) Needs for standardization. 43 Annex E (informative) Background of constructing PREsTO system architecture (SA) .... Annex F (informative) Practical examples of PRESTO 47 Bibliography 50 Copyright International Organization forstandardizallon'ghts reserved ii from IHS Not for Resi