The Commission was created in 2003. Each report briefly outlines the activities of the past year and the projects for the coming year.

The 20-year transportation plan includes roadway, transit, safety, and environmental and economic vitality elements to help meet the region's transportation goals of improving our safety and cross-town mobility, while reducing traffic congestion.

Describes the evolution of transportation routes and transportation methods in Pima County throughout time, and the effect that modes of transportation have had on the size and form of the community. Stage, freight, and railroad transportation followed the main historic corridors established by previous cultures and technologies.