Circle Interchange (P-91-259-12) Circle Interchange (P-91-259-12) Combined Design Report Combined Design Report TABLE OF CONTENTS 5.10. Social, Economic and Environmental Effects ............................................................................................. 54 VOLUME 1 OF 3 5.11. Discussion of Benefits and Costs ............................................................................................................... 54 1. INTRODUCTION ................................................................................................................................................... 1 5.12. Project Implementation ............................................................................................................................... 55 1.1. Description and Location of Project .............................................................................................................. 1 6. COORDINATION ACTIVITIES ............................................................................................................................ 57 1.2. History of Project .......................................................................................................................................... 1 6.1. Agency Coordination .................................................................................................................................. 57 1.3. Design Criteria .............................................................................................................................................. 2 6.2. Stakeholder Coordination ........................................................................................................................... 57 2. PURPOSE AND NEED FOR THE IMPROVEMENT ............................................................................................. 3 6.3. Utility Coordination ..................................................................................................................................... 58 2.1. Purpose ........................................................................................................................................................ 3 7. PUBLIC INVOLVEMENT ACTIVITIES ................................................................................................................ 59 2.2. Safety ........................................................................................................................................................... 3 7.1. Project Working Group ............................................................................................................................... 59 2.3. Mobility ......................................................................................................................................................... 7 7.2. Vibration Workshop .................................................................................................................................... 61 2.4. Facility Deficiencies ...................................................................................................................................... 8 7.3. Public Informational Meeting ...................................................................................................................... 61 3. EXISTING CONDITIONS .................................................................................................................................... 11 7.4. Public Hearing #1 ....................................................................................................................................... 62 3.1. Description of Project Area ......................................................................................................................... 11 7.5. Public Hearing #2 ....................................................................................................................................... 63 3.2. Logical Termini ........................................................................................................................................... 11 7.6. Project Website .......................................................................................................................................... 64 3.3. Land Use .................................................................................................................................................... 11 8. COMMITMENTS AND SPECIAL DESIGN/CONSTRUCTION CONSIDERATIONS ........................................... 65 3.4. Conditions on the Existing Highway Network ............................................................................................. 15 9. CONCLUSIONS AND RECOMMENDATIONS ................................................................................................... 68 3.5. Existing Drainage ....................................................................................................................................... 18 9.1. Preferred Design Alternative ....................................................................................................................... 68 3.6. Existing Utilities .......................................................................................................................................... 20 9.2. Attainment of Purpose and Need ................................................................................................................ 68 3.7. Existing Environmental Resources ............................................................................................................. 20 9.3. Design Exceptions ...................................................................................................................................... 68 4. ALTERNATIVES CONSIDERED......................................................................................................................... 22 9.4. Project Implementation ............................................................................................................................... 69 4.1. No-Build Alternative .................................................................................................................................... 22 4.2. Transportation System Management (Congestion Management Process) Alternative .............................. 22 4.3. Build Alternatives ........................................................................................................................................ 23 LIST OF FIGURES 4.4. Alternative Evaluation ................................................................................................................................. 29 Figure 1.1 Original Circle Interchange Construction ..................................................................................................... 2 5. DESCRIPTION AND ANALYSIS OF PREFERRED ALTERNATIVE STUDIED IN DETAIL ............................... 38 Figure 2.1 Crashes by Hour of Day (2006-2008) .......................................................................................................... 5 5.1. General Description .................................................................................................................................... 38 Figure 2.2 Crash Rates at Circle Interchange System Ramps ...................................................................................... 6 5.2. Attainment of Purpose and Need ................................................................................................................ 39 Figure 2.3 Typical Northbound Congestion in the PM Peak Approaching the Circle Interchange ................................ 7 5.3. Traffic Service to Region ............................................................................................................................ 47 Figure 2.4 Typical Southbound Congestion in the PM Peak Approaching the Circle .................................................... 8 5.4. Engineering Considerations and Aesthetics ............................................................................................... 47 Figure 3.1 Existing Circle Interchange ........................................................................................................................ 11 5.5. Proposed Structures ................................................................................................................................... 50 Figure 3.2 Chicagoland Expressway System .............................................................................................................. 12 5.6. Pedestrian and Bicycle Facilities ................................................................................................................ 50 Figure 3.3 National Hellenic Museum ......................................................................................................................... 13 5.7. CTA Blue Line Station Improvements ......................................................................................................... 51 Figure 3.4 Greek Monument ....................................................................................................................................... 13 5.8. Drainage Improvements ............................................................................................................................. 51 Figure 3.5 University of Illinois at Chicago East Campus ............................................................................................ 14 5.9. Utility Accommodation