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The Journey Ahead

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The Journey Ahead The journey ahead: Delivering Managed Motorway information to In-Vehicle devices Analysis Report Delivering Managed Motorway Information to In-Vehicle Devices: Analysis Report 1st issue Delivering Managed Motorway information to In-Vehicle devices : Analysis Report Revision Schedule Analysis Report 11.05.2010 Rev Date Details Prepared by Reviewed by Approved by 01 25.05.2010 1st issue Robert Cranston Adam Curry Ewan Hobbs Principal Consultant Principal Consultant Associate Scott Wilson Earl Grey House 75-85 Grey Street Newcastle upon Tyne This document has been prepared in accordance with the scope of Scott Wilson's NE1 6EF appointment with its client and is subject to the terms of that appointment. It is addressed to and for the sole and confidential use and reliance of Scott Wilson's client. Scott Wilson United Kingdom accepts no liability for any use of this document other than by its client and only for the purposes for which it was prepared and provided. No person other than the client may copy (in whole or in part) use or rely on the contents of this document, without the prior Tel 00 44 191 255 8080 written permission of the Company Secretary of Scott Wilson Ltd. Any advice, opinions, or recommendations within this document should be read and relied upon only in the Fax 00 44 191 255 8081 context of the document as a whole. The contents of this document do not provide legal or tax advice or opinion. © Scott Wilson Ltd 2009 www.scottwilson.com May 2010 1 Delivering Managed Motorway Information to In-Vehicle Devices: Analysis Report 1st issue Executive Summary This document presents an analysis of current objectives for the provision of information to motorists on Managed Motorways. The report investigates the way in which requirements for the Intelligent Transport System (ITS) responsible for this provision of information would vary in order for the same objectives to be fulfilled by means of In- Vehicle devices. The starting point for the study is a vision of a system that will, by means of in-vehicle devices, provide drivers with the same level of tactical and strategic information that is provided by the current array of roadside technologies. This is in respect not only of messages, but also lane specific speed restrictions and diversions for traffic management, including dynamic use of the Hard Shoulder on Managed Motorways. Being solely conceptual, the scope of the analysis specifically excludes detailed analysis of technology relating to In-Vehicle devices and the transmission systems that might be deployed. However, the analysis has indentified some interesting constraints on the form that a future In-Vehicle system must take. The analysis derives a number of high level draft requirements for the envisaged system. These relate to broad functional changes that would facilitate a system where roadside technologies and in-vehicle technologies can complement one another and be interchangeable to the extent that, in the future, in-vehicle devices could potentially provide an alternative to roadside devices along sections of the motorway network. As a by-product of the analysis a number of ‘Human Factor’ issues been documented. Primarily, these relate to the way information would be presented on an In-Vehicle Device. For example: should the display be auditory or visual; should the In-Vehicle device represent all lanes at a signal site and indicate the lane the vehicle is travelling in; should In-Vehicle technology replicate roadside signal and message sign flasher functionality? It is beyond the scope of this study to resolve these complex issues, but it is useful to document them here so that they may be framed with reference to the Managed Motorway information prior to future analysis. May 2010 2 Delivering Managed Motorway Information to In-Vehicle Devices: Analysis Report 1st issue Table of Contents Part 1: Introduction ................................................................................... 9 1 Introduction ................................................................................... 10 1.1 The purpose of this Document...................................................................................... 10 1.1 Background .................................................................................................................. 10 1.2 The Aim of the Analysis ................................................................................................ 10 Part 2: Methodology................................................................................ 12 2 Understanding the Current Objectives ........................................ 13 2.1 The Method of Analysis ................................................................................................ 13 3 Defining the Future System.......................................................... 19 3.1 Establishing Guiding Principles..................................................................................... 19 3.2 Analysing Objectives in Respect of In-Vehicle Devices................................................. 21 Part 3: Deriving a New System............................................................... 22 4 Filling the Gap ............................................................................... 23 4.1 Introduction................................................................................................................... 23 4.2 Data Dependencies relating to the IVD Display ............................................................ 23 4.3 Data Dependencies relating to the Method of Data Transfer......................................... 50 4.4 Data Dependency on HATMS Architecture................................................................... 74 Part 4: Top Level Specification of the Future System ........................... 94 5 IVD Functional Requirements....................................................... 95 6 Architecture Requirements .......................................................... 96 6.1 Requirements for the Transmission System.................................................................. 96 6.2 Requirements for Modifications to System Architecture ................................................ 96 7 Data Requirements........................................................................ 98 7.1 Signal Setting Data....................................................................................................... 98 7.2 Message Signs Setting Data......................................................................................... 99 Part 5: Human Factor Considerations .................................................. 100 8 General......................................................................................... 101 9 Parity of road side device and in-vehicle device ...................... 102 10 Messages..................................................................................... 103 May 2010 3 Delivering Managed Motorway Information to In-Vehicle Devices: Analysis Report 1st issue 10.1 Message duration ....................................................................................................... 103 11 Flashers ....................................................................................... 105 11.1 Message sign flashers ................................................................................................ 105 11.2 Signal flashers............................................................................................................ 105 11.3 Message sign flasher synchronisation ........................................................................ 105 12 Built in delays.............................................................................. 106 13 Signal subsystem processing of wicket aspects...................... 107 14 Summary comments on Human Factor Considerations .......... 108 Part 6: Conclusion ................................................................................. 110 15 Summary...................................................................................... 111 15.1 The Aim...................................................................................................................... 111 15.2 The Guiding Principles................................................................................................ 111 15.3 Conduct of the Analysis .............................................................................................. 112 15.4 Towards a Specification of the Future System............................................................ 114 16 The Road Ahead.......................................................................... 115 16.1 Time Lines.................................................................................................................. 115 16.2 Implementation ........................................................................................................... 116 17 Conclusion................................................................................... 119 Appendices............................................................................................. 121 Appendix A: Glossary and List of Abbreviations ............................... 123 Appendix B: HA & DFT Document References .................................... 128 Appendix C: Managed Motorway Information Objectives .................. 130 Operational Performance ......................................................................................................... 131 Latency
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