The Arizona State Rail Plan (SRP) is the first comprehensive assessment of the stateís rail needs and was initiated in response to the increasing involvement by ADOT in freight and passenger rail issues. The SRP serves to identify the current rail system, to determine infrastructure needs, and to have rail projects included in the state's long-range planning processes to improve regional and statewide safety mobility. The principle purpose is to convey the magnitude of the rail needs in the state and set forth a policy framework through which strategic actions can be taken to realize the full potential of passenger and freight rail transportation.

This version of the Major Streets and Routes Plan revises the original plan and the 2004 revisions. Looking ahead to pending updates to the classification systems of towns and cities in Maricopa County, the original MSRP stipulated a periodic review and modification of the street functional classification portion of the plan. This revision incorporates the following changes: (1) as anticipated, many of the communities in the County have updated either their general or transportation plans in the time since the adoption of the first MSRP; (2) a new roadway classification, the Arizona Parkway, has been added to the Maricopa County street classification system and the expressway classification has been removed; and (3) a series of regional framework studies have been conducted by the Maricopa Association of Governments to establish comprehensive roadway networks in parts of the West Valley.