Acronyms
 C2C: Center to Center
 C2F: Center to Field
 CA: Certificate Authority
 CAA: Clean Air Act
 CACC: Cooperative Adaptive Cruise Control
 CAD: Computer Aided Dispatch
 CAMP: Crash Avoidance Metrics Partnership
 CAN: Controller Area Network
 CARTS: Capital Area Rural Transportation System
 CAV: Connected (or Cooperative) Automated Vehicle
 CBP: Customs and Border Protection
 CC: Container Contents
 CCMS: Cooperative ITS Credentials Management System
 CCOD: Container/Chassis Operating Data
 CCSDS: Consultive Committee for Space Data Systems
 CCTV: Closed Circuit TV
 CD: Compact Disc
 CDMA: Code Division Multiple Access
 CDOT: Colorado Department of Transportation
 CD-ROM: CD Read Only Memory
 CEFM: Columbus Electronic Freight Management
 CFR: Code of Federal Regulations
 CIA: Community Impact Assessment
 CICAS: Cooperative Intersection Collision Avoidance Systems
 C-ITS: Cooperative Intelligent Transportation System
 C-ITS: Cooperative ITS
 CLW: Control Loss Warning
 CM: Configuration Management
 CMAP: Chicago Metropolitan Agency for Planning
 CMFs: Capability Maturity Frameworks
 CMM: Capability Maturity Model
 CMP: Congestion Management Process
 CMS: Changeable Message Sign, Congestion Management System
 CMV: Commercial Motor Vehicle
 CO: Carbon Monoxide
 CO2: Carbon Dioxide
 COFC: Container on Flatcar
 COGs: Council of Governments
 CON OP: Concept of Operations
 ConOps: Concept of Operations
 COTS: Commercial Off the Shelf
 CRCS: Connected Roadway Classification System
 CRL: Certificate Revocation List
 CSR: Certificate Signing Request
 CSW: Curve Speed Warning
 CTPP: Census Transportation Planning Products Program
 CV: Connected Vehicle
 CV: Commercial Vehicle
 C-V2X: Connected Vehicle-to-everything or Cellular-Vehicle-to-everything
 CVAC: Commercial Vehicle Administration Center
 CVAS: Commercial Vehicle Administration Subsystem (legacy National ITS Architecture)
 CVCE: Commercial Vehicle Check Equipment
 CVCS: Commercial Vehicle Check Subsystem (legacy National ITS Architecture)
 CVE: Connected Vehicle Environment
 CVISN: Commercial Vehicle Information Systems and Networks
 CVO: Commercial Vehicle Operations
 CVO: Commercial Vehicle Operators
 CVOBE-SP: Commercial Vehicle On-Board Equipment Service Provider
 CVRIA: Connected Vehicle Reference Implementation Architecture
 CVS: Commercial Vehicle Subsystem (legacy National ITS Architecture)