Cooperative –Intelligent Transport Systems (C-ITS) technologies offer transformative opportunities for transportation. C-ITS delivers dedicated, trusted connectivity that results in significant improvements in safety and mobility, open data environments that that transform system operations, and communications between vehicles and infrastructure. By enabling these technologies, a technology continuum is created that builds to more exciting innovations such as Smart Connected Cities.

As deployment planning moves forward into pilot operational sites, questions arise about how to ensure security for such a complex technical system.  In late 2013, the European Commission (EC), the United States Department of Transportation (USDOT), and Transport Certification Australia (TCA) committed resources and experts to develop a harmonized policy framework in a way that maximized benefits for all Nations and minimized duplicative efforts.  This initiative ran in parallel with the technical development of security solutions. The results of HTG6 collaboration are: a policy framework as well as guidance for decision-makers and technical deployers as they seek harmonized security solutions within and across borders.

The body of work produced by HTG6 members presents the maximum set of common policy approaches that return benefits.  While many C-ITS security policies and approaches can differ regionally without negative impact to jurisdictional deployments, important benefits are realized from a set of policies being as similar as practical across regions.

As jurisdictions take steps toward planning and deploying C-ITS including near-term system upgrades or the addition of new applications, the HTG 6 results can support interaction with other emerging C-ITS systems while preserving local functionality.

HTG6 Reports

  • Executive Summary (HTG6-1). An executive summary of the key results from HTG6 work for policy and decision makers. 
  • Summary of Results (HTG6-2). An overview of the HTG6 results, including recommendations and checklists for implementers.
  • Architecture Analysis (HTG6-3). Comparisons of four a Public Key Infrastructure (PKI) security systems to highlight areas for harmonization and assign a priority level to harmonization decisions.
  • Functional Decomposition Analysis (HTG6-4). Areas identified as “highly beneficial” for harmonization in HTG6-3 are illustrated along with technical solutions as they are needed throughout technology lifecycles. 

The following documents will be published soon.

  • Organizational Analysis (HTG6-5). Investigation of how harmonized policies support trust models between and among organizations. 
  • Risk Management Framework (HTG6-6). A process to identify and categorize risks in order to implement appropriate technical and policy controls.
  • Background Documents.
    • PKI Primer (HTG6-7)
    • Primer on the Intelligent Transport Systems (ITS) Station concept and the Connected Vehicle Reference Implementation Architecture (CVRIA) (HTG6-8)
    • Glossary (HTG6-9)
  • Questions and comments on these draft documents are welcome, as feedback will improve the final products. Please send comments to: