Field infrastructure footprint analysis

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Design Gaps Analysis

Contract No. DTFH61-11-D-00008

Submitted to:

U.S. Department of Transportation

Federal Highway Administration

By the:

American Association of State Highway
and Transportation Officials

aashto logo_i_rgb_jpeg

Version 1


June 28, 2012

Document Versions




Draft submitted for review, June 28, 2013

Table of Contents

1.Introduction 5

1.1.Background 5

1.2.Document Purpose 5

1.3.Document Overview 6

2.Design Gaps 7

2.1.Connected Vehicle System Architecture 7

2.1.1.System Architecture Description and Requirements 7

2.1.2.System Boundary 8

2.1.3.Non Extensible Architecture 8

2.1.4.Relationship between RSE and Applications 9

2.1.5.Relationship between RSE Location, Applications and Latency 10

2.2.Equipment Installation 11

2.3.Connected Vehicle Data Needs and Standards 11

1.1.1.Infrastructure Data Message Standards: the BSM 11

1.1.2.Infrastructure Data Message Standards: Extensibility 12

1.1.3.Location-based Warning in the Map Linkage Structure 13

1.1.4.Map Database Assumptions 13

2.4.Security 14

2.4.1.WWAN Messaging and Security 14

2.4.2.Field Equipment/Application Certification/Tamper Resistance 14

2.4.3.Vehicle/Application Certification 15

2.4.4.Retirement/End of Life 15

2.4.5.Revoked Device Management 16

2.4.6.Bootstrap and Device Certification 16

2.5.Backhaul Network 18

2.6.Mapping Support 18

1.1.5.Road Geometry Data Standards 19

1.1.6.Map Message Content 19

1.1.7.Road Geometry Data Maintenance 20

2.7.International Land Border Crossings 21

2.7.1.Organizational and Technical Capabilities 21

2.7.2.Border Information Flow Architecture 21

2.7.3.Physical and Communication Security 22

2.7.4.Bi-National Data Exchange Protocols and Standards 22

2.8.Policy/Governance Gaps 23

2.8.1.Infrastructure Data Business Models 23

2.8.2.RSU Management and Access Requirements 24

2.8.3.Cross Border Identified Certificate Administration 24

2.8.4.Deployment Goals and Strategy 25

Appendix A. Acronyms 26

List of Identified Gaps



This technical memo is part of a study sponsored by the US Department of Transportation (USDOT) and performed by the American Association of State Highway and Transportation Officials (AASHTO). The purpose of this project is to conduct analyses leading to a preliminary, general concept of a national connected vehicle field infrastructure footprint. Describing such a footprint satisfies many requirements in developing a policy foundation for the connected vehicle environment, including development of a set of desired outcomes which include:

  • A description, for State and local investment and decision makers, of the justification for and value of deployment of connected vehicle infrastructure.

  • A compilation of the data, communications, and infrastructure needs of the priority applications.

  • A set of generic, design concepts (at a high-level of engineering detail) that relate the infrastructure to the applications (or bundles of applications) and their needs under different operational conditions.

  • A set of State- and local-based scenarios identifying how and where agencies might implement secure, connected vehicle infrastructure and what funding strategies might use to support such deployment, and a synthesis of these scenarios into a preliminary national footprint of connected vehicle field infrastructure.

  • A phased deployment plan which identifies the actions and funding strategies needed over a period of time for coordinated implementation of a national connected vehicle field infrastructure.

  • Cost estimates for deployment, operations, and maintenance.

  • Estimates of workforce and training requirements; and identification of policy and guidance needs.

  • Identification of implementation challenges and institutional issues and identification of the timing by which those issues need to be resolved to achieve deployment.

This technical memo specifically relates to the identification and analysis of design gaps.

1.2.Document Purpose

The purpose of this document is to identify, describe, and make recommendations to address apparent gaps between the National Connected Vehicle Field Infrastructure Footprint Analysis Design Concepts developed in Task 5 of the study and the ongoing technology development, design, implementation, policy development and governance of connected vehicle applications.

1.3.Document Overview

Following this introductory section, the document consists of a series of design gap discussions, structured loosely around topical areas of concern. The discussion of each gap consists of a one-sentence description or label, a summary of the key issues from which the gap arises, and recommendations for addressing the perceived gap.

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