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IDOT has a three-phase project development process, as shown on the timeline graphic below. Projects in Phase I, like the Illinois I-270 Preliminary Engineering Study, include funds to conduct a Preliminary Engineering and Environmental Study which provides support for the determination of a preferred option. During this phase, proposed geometry, environmental concerns, and proposed right-of-way are identified. Subsequently, a Phase II design of the preferred option will result in developing contract plans and acquiring land. The third and final phase will focus on construction. Phase I is currently nearing completion, IDOT’s Multi-Year Program includes Phase II Engineering and several sections of Phase III Construction. See IDOT’s Multi-Year Program.
Project Schedule
