Corridor Level Planning
Transportation corridor planning is a cooperative process that fosters the involvement of all users of a transportation system, including government resource agencies, businesses, community groups, environmental organizations, freight operations and the public. It lays the foundation for key information such as (1) the preliminary purpose and need for the action; (2) a reasonable range of options for meeting the stated need; (3) a description of the potentially affected environment; and (4) the anticipated environmental effects.
TDOT used a "revolutionary" modeling system during the corridor-level planning phase. This tool, called the QUANTM system, has been designed to support planners through the complex process of selecting corridors. QUANTM uses a holistic approach that considers a variety of criteria, including environmental protection, cultural heritage, community values, terrain, geometric/design standards, crossing of features and minimizing construction costs. This approach has also demonstrated a considerable reduction in project planning time and costs.
Transportation Planning Report
In spring 2010, TDOT completed a Transportation Planning Report (TPR) as part of the corridor-level planning process. The TPR is a report designed to streamline project development by providing detailed project-related information earlier in the planning process prior to a more detailed environmental review.
The TPR process provided an opportunity to integrate both technical information and community input early in project planning. Based on collaborative agency and community input, preliminary environmental screening, and study area information, the TPR establishes the preliminary need for the project and identifies potential corridor options for further study. The TPR also describes high-level environmental issues within the corridor study area.
Multiple study corridors must be considered to fulfill the transportation need and keep adverse environmental impacts at a minimum. Detailed roadway alignments will be determined during environmental review.
Currently, an Environmental Impact Statement (EIS) is being prepared in accordance with the National Environmental Policy Act of 1969 (NEPA). NEPA is a federal law that requires agencies to prepare an EIS for federally-funded projects that may significantly affect the environment.
The EIS will provide comprehensive information about why the project is being proposed (purpose and need), proposed plans, and potential environmental, social, and economic effects. These analyses will inform stakeholders about proposed alternatives and their potential effects and is used to help decision-makers consider how the project should proceed.
Like the corridor-level planning process, the EIS will be developed through coordination with local, state and federal agencies, organizations and the public. Visit the Public Involvement page to learn about how you can participate in the environmental review process.
The environmental review process under NEPA involves a series of milestones. Visit the Project Timeline page to learn more.
Learn more about the NEPA process by viewing the Council of Environmental Quality’s A Citizen’s Guide to NEPA.