Transportation System Plan

Maricopa County Department of Transportation (MCDOT) plans, designs, builds, maintains, and operates roadways within unincorporated Maricopa County. The Transportation System Plan (TSP) analyzes and tracks current and future needs for the MCDOT Roadway System.

Plan Updates

The TSP was last updated in 2007 (PDF). It is now being updated to project roadway improvement needs through the year 2035. The new TSP efforts account for population and employment growth and will identify potential roadway improvement needs on existing MCDOT owned and/or operated roadways.

Final report is now available.

Interactive Map

Click on the map below to see the progress we have made with the Transportation System Plan 2035.
View map of considered projects

Milestone Schedule

Dates are approximate.
Phase I: Research and Data Collection Spring 2015
Public Input Meetings Complete
Phase II: Plan Development June 2016
Public Input Meetings April - May 2016
Phase III: Plan Adoption December 2016
Draft Final Report
Transportation Advisory Board Recommendation
August 2016
August 2016
Board of Supervisors Adoption December 2016

Why a Transportation System Plan?

The MCDOT Roadway System currently makes up over 5,300 lane-miles of roadway.


The purpose of the Transportation System Plan (TSP) is to plan for future transportation needs in Maricopa County which will support MCDOT in its mission to provide connections that improve people's lives throughout the County. The TSP includes goals, objectives, and strategies to help MCDOT plan for future travel demand.

Summary of Goals

The TSP goals, objectives, and strategies were shaped through five stakeholder workshops. The following is a summary of the goals, or you can view the complete document of goals, objectives, and strategies (PDF).

Primary TSP Goals Include:

  • Promote quality of life and economic vitality.
  • Provide a system that is safe and efficient for all modes of travel.
  • Encourage a seamless regional transportation network.
  • Protect past and future transportation investments through strategic system preservation.

What is the TSP?

The Maricopa County Department of Transportation (MCDOT) Transportation System Plan (TSP) is a long-range plan that establishes a framework for the current and future transportation needs of all Maricopa County residents. The TSP outlines a vision for the planning and construction of facilities on the MCDOT Roadway System.

MCDOT's current TSP was approved by the County Board of Supervisors in 2007. The 2007 TSP outlined a vision for the planning and construction of facilities through 2026. The current update to the TSP outlines a vision for the planning and construction of facilities through 2035.

Three Phases

There are three phases in the TSP 2035 process.

Phase 1: Research & Data Collection

Phase 1 is a regional planning-level evaluation and consists of gathering data on existing and planned transportation facilities, analyzing information and developing travel demand models and forecasts. This effort includes a Needs Analysis report, an Alternative Modes evaluation and the gathering of initial information for funding.

Phase 2: Plan Development

Phase 2 includes organizing information gathered during Phase I and developing a draft document for technical and public review and comment.

Phase 3: Plan Adoption

During the final phase of TSP 2035, the Draft TSP 2035 is submitted for review to and recommendation by the Transportation Advisory Board. This is followed by review and formal adoption by the Maricopa County Board of Supervisors.

All three phases are conducted in consultation with a Technical Advisory Committee (TAC) and a Stakeholder Advisory Committee (SAC) representing agency and constituency interests. The TAC/SAC assists in the identification and resolution of issues or differing requirements to build a broad-based consensus which guides the development of the TSP update.

The following is a list of information that will be contained within the TSP 2035. Additional information may be added during the TSP 2035 process.


  • Goals, Objectives, and Strategies
  • Process
  • Purpose


  • System Planning
  • System Preservation


  • Alternative Mode
  • Existing Roadway Network
  • Potential Projects
  • Socioeconomic Profile
  • Traffic Analysis


  • MCDOT Smart Drive
  • Roadway Programs Safety Initiatives
  • Traffic Count Program
  • Traffic Management Center


  • Funding
  • Project Rating Process
  • Project Recommendations