The primary need for these realignments is due to the planned airport expansion at Tucson International Airport. The purpose of this report is to compare various alignment alternatives for the realignment on the basis of access, cost, right-of-way, and floodplain impacts.

The purpose of this study is to (1) develop a fundamental understanding of the problems that exist, and (2) perform a cursory examination of possible management approaches identifying those that appear most plausible for further consideration.

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.