The Connected Transportation Interoperability (CTI) family of standards are a series of documents that are jointly developed by stakeholders across the connected vehicle spectrum, including infrastructure owner operators (IOOs), the automotive industries, device manufacturers, mobility data providers, and systems integrators. These stakeholders and many others are represented by the following Standards Development Organizations (SDOs), including American Association of State Highway and Transportation Officials (AASHTO), Institute of Transportation Engineers (ITE), National Electrical Manufacturers Association (NEMA) and SAE International. Sponsored by the United States Department of Transportation (USDOT), documents in the CTI family may be approved and published by any of SDOs mentioned but are developed and maintained by representatives across the connected vehicle spectrum. The documents in the CTI family include standards and technical reports that provide guidance to develop and maintain an interoperable connected vehicle environment.