1. I-70 Second Tier Environmental Studies SIU #7 Presentation to TEAM September 16, 2004

2. 7 Sections of Independent Utility Seven Independent Studies 2nd Tier

3.  Route 19 (MP 174) to Lake St. Louis Blvd (MP 214)  40 miles in length, 13 Existing Interchanges  Current ADT: 29,000 to 68,000  Year 2030 Projected ADT: 74,000 to 98,000 SIU #7 2nd Tier

4. Conceptual Corridor Reevaluation Rural Area Widening Alternatives Analysis Urban Area Widening Alternatives Analysis Interchange Alternatives Evaluation Environmental Impact Statement Public Involvement Program Major Study Components

5. Conceptual Corridor Reevaluation Existing I-70 Corridor South Conceptual Corridor Near North Conceptual Corridor Far North Conceptual Corridor

7. Conceptual Corridor Reevaluation Criteria Compatibility with Local and Regional Planning Goals Local and Regional Economic Impacts Impacts on Natural Resources Preliminary Construction and Maintenance Costs Transportation Impacts

8. Local and Regional Land Use and Transportation Planners 30 Participants from Warren, St. Charles and St. Louis Counties Generally opposed to new corridors Land Use Forum 2nd Tier

9. Travel Demand Modeling for Conceptual Corridor Reevaluation GEC’s Statewide Travel Demand Model EWGCC St. Louis Region Model Evaluate “Downstream” Traffic Impacts on St. Louis County

11. Rural Area Widening Alternatives Evaluation Western Terminus (MP 174) to just west of Warrenton (MP 189) Widen to North or South Considered Displacements, Cultural Resources, Wetlands, Floodplains, Crossovers Documented in Technical Memorandum

12. Urban Area Widening Alternatives 4 Through Lanes in Each Direction 12-foot Inside Shoulders Separated by Barrier Room for Future 5 th Lane Reserved to Outside Offset from Existing Centerline Varies

13. Interchange Alternatives Evaluation Brainstorming / Sketching Study Team Review – Constructibility, Driver Expectation Interchange Workshops with Locals Screening based on Engineering, Traffic Operations, Socioeconomic and Natural Environment Impacts

14. Traffic Operations Analysis Multiple levels of analysis = Multiple ‘tools’  Conceptual Corridor Evaluation: HCS  Design Support: SYNCHRO, aaSIDRA  Alternatives Evaluation: VISSIM

15. VISSIM  Allows for system analysis  9 PM Peak Hour models 3 per county: existing, 2030, and 2030 alternate Mainline Interchanges  System to System  Diamond  Diamond with roundabouts  SPUI Crossroads  Some frontage road intersections

16. Current Status of Study Draft Environmental Impact Statement Final Review Next Week Public Hearing on Draft EIS November/December, 2004 Final EIS Early 2005 Record of Decision for SIU 7, Spring 2005