Agencies
Services
Resources
Documents and Exhibits
During the Illinois I-270 Preliminary Engineering Study, several documents and exhibits will be produced. Please visit this page often to view these documents.
I-270 / IL 111 Diverging Diamond Interchange Simulation
- Draft Section 4(f) Evaluation
- Existing Traffic Volumes
- Virtual Public Meeting #2
- Virtual Public Meeting #2 Q&A
- Interchange-Design-Study_IL-Route-111-Interim
- Interchange-Design-Study-IL-Route-111-FINAL
- Interchange-Design-Study_IL-Route-203
- Interchange-Design-Study-IL-Route-3
- Location Map
- Proposed-Traffic-Volumes_2044-DRAFT
- Typical-Sections-DRAFT
- Vicinity-Map-1
Media
Press Releases
September 10, 2018 - Public Meeting for I-270 Preliminary Engineering Study from Riverview Drive Interchange in Missouri to IL Route 157 in Madison County, Illinois
Illinois Business Journal: Public meeting set for plans along I-270 corridor
AdVantage News: IDOT to gather input about I-270 project