This document outlines an Intelligent Transportation Systems (ITS) Architecture for Chittenden County, Vermont. The Chittenden County Metropolitan Planning Organization (CCMPO), in cooperation with numerous local, regional, and state transportation and emergency management stakeholders, has developed this architecture to provide a framework for coordinated ITS deployment in the county over the next ten (10) years. The Chittenden County Regional ITS Architecture has been developed in conjunction with a parallel Vermont Statewide ITS Architecture initiative.