1 Scope

2 Normative references

3 Terms and definitions

4 Symbols and abbreviated terms

4.1 3G

4.2 3GPP

4.3 4G

4.4 5G

4.5 ADS

4.6 ARC-IT

4.7 C-ITS

4.8 CCMS

4.9 DDT

4.10 DSRC

4.11 FM

4.12 GNSS

4.13 HMI

4.14 IEC

4.15 IEEE

4.16 ISO

4.17 ITS

4.18 LTE-V2X

4.19 METR

4.20 MUTCD

4.21 OBE

4.22 OCR

4.23 ODD

4.24 OEM

4.25 PMR

4.26 QR

4.27 RSU

4.28 TC

4.29 TMDD

4.30 TN-ITS

4.31 TPEG

4.32 UK

4.33 UNECE

4.34 US

4.35 USDOT

4.36 UTC

4.37 Wi-Fi

4.38 WP

5 Current system or situation

5.1 General

5.2 Background, objectives and scope

5.2.1 Background

5.2.2 Objectives

5.2.3 Scope of application

5.3 Operational policies and constraints

5.3.1 Policies

5.3.2 Constraints

5.4 Description of the current situation

5.4.1 General

5.4.2 Processes

5.4.3 Data flows

5.4.4 Responsible stakeholders

5.4.4.1 Rule maker

5.4.4.2 Implementer

5.4.4.2.1 Publicizing rules

5.4.4.2.2 Challenges

5.4.4.2.3 Rule implementation

5.4.4.3 Supporting data provider

5.4.4.4 Transport user

5.4.4.4.1 General

5.4.4.4.2 Awareness

5.4.4.4.3 Location accuracy

5.4.4.4.4 Context

5.4.4.4.5 Proper judgement

5.4.5 Data Details

5.4.5.1 Rules

5.4.5.1.1 Rule lifecycle

5.4.5.1.2 Rule characteristics

5.4.5.1.3 Rule precedence

5.4.5.1.4 Jurisdictional boundaries

5.4.5.1.5 Conclusion

5.4.5.2 Traffic control devices

5.4.5.2.1 General

5.4.5.2.2 Maintenance

5.4.5.2.3 Public record

5.4.5.2.4 Environment

5.4.5.2.5 Vehicle or device

5.5 Modes of operation for the current situation

5.6 User classes and other involved personnel

5.6.1 General

5.6.2 Users subject to rules

5.6.3 Entities that establish rules

5.6.4 Third party entities

5.7 Support environment

5.7.1 General

5.7.2 Sources of support

5.7.2.1 Travellers

5.7.2.1.1 General

5.7.2.1.2 Vehicle maintenance

5.7.2.1.3 Technology updates

5.7.2.2 Delivery service users

5.7.2.3 Driving automation systems

5.7.2.4 Vehicle/device owners

5.7.2.5 Transport service providers

6 Justification for and nature of changes

6.1 General

6.2 Justification of changes

6.2.1 General

6.2.2 Evolving transport environment

6.2.3 Discrepancy Reports

6.3 User need statements

6.3.1 Trustworthiness Needs

6.3.1.1 Trustworthiness — Reliability — Accuracy

6.3.1.2 Trustworthiness — Reliability — Availability — Connectivity

6.3.1.3 Trustworthiness — Reliability — Availability — Geographic boundaries

6.3.1.4 Trustworthiness — Reliability — Availability — Rule coverage

6.3.1.5 Trustworthiness — Reliability — Availability — Supporting data coverage

6.3.1.6 Trustworthiness — Reliability — Availability — Interruptions

6.3.1.7 Trustworthiness — Reliability — Availability — Degradation

6.3.1.8 Trustworthiness — Reliability — Completeness

6.3.1.9 Trustworthiness — Reliability — Quality — Clarity

6.3.1.10 Trustworthiness — Reliability — Quality — Expiration

6.3.1.11 Trustworthiness — Reliability — Quality — Legal status

6.3.1.12 Trustworthiness — Reliability — Quality — Confidence metrics

6.3.1.13 Trustworthiness — Reliability — Resilience

6.3.1.14 Trustworthiness — Reliability — Timeliness — Rules

6.3.1.15 Trustworthiness — Reliability — Timeliness — Supporting data

6.3.1.16 Trustworthiness — Reliability — Transparency

6.3.1.17 Trustworthiness — Reliability — Usability — Language neutrality

6.3.1.18 Trustworthiness — Reliability — Usability — Features

6.3.1.19 Trustworthiness — Security — Authority — Access control

6.3.1.20 Trustworthiness — Security — Authority — Data privacy

6.3.1.21 Trustworthiness — Security — Authority — Legitimacy

6.3.1.22 Trustworthiness — Security — Confidentiality

6.3.1.23 Trustworthiness — Security — Integrity — Accountability

6.3.1.24 Trustworthiness — Security — Integrity — Authenticity

6.3.2 User needs

6.3.2.1 User — Distributor — Discovery

6.3.2.2 User — Distributor — Terms of service

6.3.2.3 User — Connectivity — Preferences

6.3.2.4 User — Awareness — Jurisdictional classification schemes

6.3.2.5 User — Awareness — Self-awareness

6.3.2.6 User — Awareness — Mapping

6.3.2.7 User — Awareness — Geopositioning

6.3.2.8 User — Conflicts — Detected

6.3.2.9 User — Facility — Defined area

6.3.2.10 User — Jurisdiction — Sub-areas

6.3.2.11 User — Rule — Awareness

6.3.2.12 User — Rule — Characteristics

6.3.2.13 User — Rule — Definition

6.3.2.14 User — Rule — Precedence

6.3.2.15 User — Rule — Distribution — Prioritization

6.3.2.16 User — Rule — Distribution — Efficiency

6.3.2.17 User — Rule — Applicability — Permits

6.3.2.18 User — Rule — Journey planning

6.3.2.19 User — Rule — Obsolescence

6.3.2.20 User — Status — Manual inputs

6.3.2.21 User — Status — Environmental awareness

6.3.2.22 User — System — Upgrade

6.3.3 Rule maker needs

6.3.3.1 Rule maker — Jurisdictions — Identification

6.3.3.2 Rule maker — Rule signer

6.3.3.3 Rule maker — Translation agent

6.3.3.4 Rule maker — Publicize — Rules at a distance

6.3.3.5 Rule maker — Rules — Non-electronic

6.3.3.6 Rule maker — Discrepancies — Primary

6.3.3.7 Rule maker — Discrepancies — Secondary

6.3.3.8 Rule maker — Rule discovery service

6.3.3.9 Rule maker — Independent verification

6.3.4 Third party needs

6.3.4.1 Third party — Auditing

6.4 Priorities

6.5 Deferred user needs

6.5.1 General

6.5.2 User needs deferred to a future release

6.5.2.1 Precise legal meaning of rules

6.5.2.2 Aerial drones

6.5.2.3 Indoor pedestrian environments

6.5.3 User needs considered but not included

6.6 Assumptions and constraints

6.6.1 Assumptions

6.6.1.1 Users — Modes

6.6.1.2 Users — Variety

6.6.1.3 Users — Mixed environment

6.6.1.4 Users — Stationary users

6.6.1.5 Communications — Stationary components — Sufficient bandwidth

6.6.1.6 Communications — Mobile users — Mobile wireless internet

6.6.1.7 Communications — Mobile users — Instability of internet access

6.6.1.8 Communications — Mobile users — Areas without internet coverage

6.6.1.9 Communications — Mobile users — Short-range wireless

6.6.1.10 Communications — Delivery — Pre-announced rules

6.6.1.11 Communications — Delivery — Emergent rules

6.6.1.12 Communications — Delivery — Supporting data

6.6.1.13 Communications — Delivery — Third party

6.6.1.14 Geopositioning — Accuracy

6.6.1.15 Safety — Rule makers

6.6.1.16 Safety — Users

6.6.1.17 Safety — Reliance

6.6.2 Constraints

6.6.2.1 Communications — Delivery — Efficiency

6.6.2.2 Forwards and backwards compatibility

6.6.2.3 Existing standards

6.6.2.4 Limitations of short-range wireless communications

6.6.2.5 Aerial drones

6.6.2.6 Radio frequency regulations

7 Concepts for the proposed system

7.1 General

7.2 Background, objectives, and scope

7.3 Operational policies and constraints

7.3.1 Policies

7.3.2 Constraints

7.4 Description of the proposed system

7.4.1 Overview

7.4.2 Processes

7.4.3 Data flows

7.5 Modes of operation

7.5.1 General

7.5.2 Normal mode

7.5.3 Degraded mode

7.5.4 Fallback mode

7.6 User classes and other involved personnel

7.7 Support environment

7.7.1 General

7.7.2 Rule discovery service

7.7.3 Service registration and discovery service

7.7.4 Security service

7.7.5 Technology services

7.7.6 METR Certification

7.7.7 Maintenance

7.7.8 Enforcement

7.7.9 Academic research and advocacy

8 Summary of impacts

8.1 Operational impacts

8.2 Organizational impacts

8.3 Impacts during development

9 Analysis of the proposed system

9.1 Benefits

9.2 Disadvantages and limitations

9.3 Alternatives considered

10 Operational scenarios

10.1 General

10.2 Sandy the busy mother

10.2.1 General

10.2.2 Refresh rule set

10.2.3 Snowy conditions

10.2.4 Start of snowfall

10.2.5 Operation of a traffic signal

10.2.6 Locating appropriate parking

10.3 Trip to grandma's house

10.3.1 Overview

10.3.2 Download rule set for long journey

10.3.3 Encountering road works

10.3.4 Encountering a new traffic control device

10.3.5 Encountering a variable speed limit

10.3.6 Snow chain requirements

10.3.7 Pit stop

10.3.8 ADS fallback based on METR information

10.3.9 Starting outside of METR coverage

10.4 Klaus the truck operator

10.4.1 Overview

10.4.2 Download rules

10.4.3 Hazardous goods

10.4.4 Encountering rain

10.4.5 Emergent rules due to emergency

10.4.6 Downloading new rules en-route

10.4.7 Transition to manual control

10.4.8 Turn prohibited

10.4.9 Crossing a major border

10.4.10 On-board management of rules

10.5 Bilo the jet-set professor

10.5.1 Overview

10.5.2 Configuring the car

10.5.3 Rental car

10.5.4 Campus rules

10.5.5 Rule discrepancy

10.5.6 Permitted parking

10.5.7 Micromobility and VRUs

10.6 Partially blind Fiona

10.6.1 Overview

10.6.2 Navigation to meeting spot

10.6.3 Kerbside pickup

10.7 Rosie the delivery robot

10.7.1 Overview

10.7.2 Parking the van

10.7.3 Sidewalk closure

10.7.4 Reporting unexpected conditions

10.7.5 Propagation of conditions

10.8 Thibideaux on the Bayou

10.8.1 Overview

10.8.2 Evacuation orders

10.8.3 Manual traffic directions

10.8.4 Ignoring signs that are overridden

10.8.5 Reporting inconsistent data

10.8.6 Encountering a disabled traffic signal

10.9 Larry the lawyer

10.9.1 Overview

10.9.2 Defence

10.9.3 Prosecution

10.9.4 Rebuttal

10.10 Tracy the Traffic Engineer

10.10.1 Overview

10.10.2 Investigation

10.10.3 Rule approval

10.10.4 Work orders

10.10.5 METR pre-announced rules

10.10.6 METR emergent rules and supporting data

11 Data flow diagram conventions

11.1 General

11.2 Naming conventions

11.3 Diagrams provide limited context

12 Tentative categories for METR information

12.1 General

12.2 Vocabulary categories

12.3 Rule Categories

13 Change request process

13.1 General

13.2 Requesting changes

13.3 Impacts to the standards series

14 Bibliography