March 30, 2017 17:57 Updated Follow Phase I (Tier One and Tier Two EISs) may take up to four years to complete and Phase II (Final Design and Construction Plans) typically takes approximately two years. However, at this time only Phase I is funded. Related articles How do I find information regarding highway road closings/construction? Is the project funded... how will it be funded? What is the Property Acquisition Process? Why is the Illiana needed? Who can I contact about this study?