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I-475 and M-21 corridor study in Flint.
Department of Transportation


Studies help MDOT determine project need, as well as environmental, cultural, and social impacts. Studying a proposed project/area and giving the public an opportunity to participate in the transportation decision-making process ensures a better outcome for all Michigan residents.

Learn more about MDOT studies and how you can become involved.

Get Involved!

Participate in MDOT Decisions

Public participation is integral to efficient, effective and responsive transportation decisions. MDOT values and encourages public involvement throughout its planning processes, from start to finish. In fact, your thoughts and opinions play an important role in shaping Michigan's transportation future. 

Learn more about MDOT's Public Involvement process.

At MDOT, we want to ensure your voice is not only heard, but makes a difference in moving Michigan forward!

Public Comment Form

MDOT Studies

Planning and Environmental Linkages (PEL) process approach to transportation decision-making considers environmental, historical, cultural, and feasibility issues early in the transportation planning process. Public engagement gives the community the opportunity to be part of the process and guide the project team to acceptable decisions. The information analysis and products developed during the PEL study is then used to inform the formal federal National Environmental Policy Act (NEPA) environmental review process.


Environmental Assessment (EA) is required when the significance of the environmental impacts are uncertain. The purpose of this process is to clarify any uncertainty and document the finding. If no significant impacts are found, the process is concluded with a Finding of No Significant Impact (FONSI). However, if there are significant impacts, an Environmental Impact Statement (EIS) is then completed.


Guidelines ensure the public has ample opportunity to effectively participate in transportation decision-making. They also ensure that the development of transportation programs and projects in Michigan support federal, state and local goals and objectives.

NEPA Guidelines

National Historic Preservation Act, Section 106 Process