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Friday, July 20, 2007 10:52 AM

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What Is VII?

The aim of the VII program is to deploy an enabling communications infrastructure that supports vehicle-to-infrastructure, as well as vehicle-to-vehicle communications, for a variety of vehicle safety applications and transportation operations. Additionally, VII will enable the deployment of a variety of applications that support private interests, including those of vehicle manufacturers.

The VII program is a multi-faceted, multi-disciplinary program. Its ultimate rollout and deployment will insert various ITS technologies into the transportation infrastructure and integrate ITS communications and sensors in vehicles.

This initiative will build on the availability of advanced vehicle safety systems developed under the Intelligent Vehicle Initiative (IVI) and on the results of related research and operational tests. It is also supported by radio spectrum at 5.9 GHz specifically allocated for DSRC.

The fundamental building blocks of the VII concept are coordinated deployments of communication technologies:

  • In all vehicles by the automotive industry, and
  • On all major U.S. roadways by the transportation public sector.

Data transmitted from the roadside to the vehicle could warn a driver that it is not safe to enter an intersection. Vehicles could serve as data collectors and anonymously transmit traffic and road condition information from every major road within the transportation network.  Such information would provide transportation agencies with the information needed to implement active strategies to relieve traffic congestion. 

Why VII?

Because we have a unique opportunity to change the curve - we can reduce delay, we can save lives, and we can make a dramatic difference. There are 42,000 fatalities each year, and VII can start us down the path of reducing and eventually eliminating them.


  • A VII Coalition has been established to determine the feasibility of widespread deployment and to establish an implementation strategy. The coalition consists of the vehicle manufacturers already involved in the IVI, AASHTO, ten State Departments of Transportation, and the US DOT.
  • The VII Coalition has an Executive Leadership Team, a technical and policy level Working Group, and several subcomittees devoted to resolving important issues such as technical, institutional, and business.
  • A general timeline has been developed and is guiding the exploration of the VII concept, as depicted in the following graphic:
  • Version 1.1 of the VII Architecture and Functional Requirements (dated July 20, 2005) is available and was outlined at a public meeting in late July 2005. This high level architecture, based upon DSRC as a communications medium, describes the functional requirements of the proposed system, which is further divided into 4 elements (the vehicle, roadside infrastructure, and a network for each of public and private uses). The development of the VII Architecture remains a dynamic process, which reflects the complex nature of the VII technical and institutional issues.

Learn more about the VII Initiative from the US DOT ITS Joint Program Office website


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