Interchange Feasibility Study I-88/Illinois Route 47 Full Interchange Kane County, IL Prepared for Village of Sugar Grove, Illinois August 5, 2010 Prepared by GRAEF 8501 West Higgins Road, Suite 280 Chicago, Illinois 60631-2801 Telephone: (773) 399-0112 FAX: (773) 399-0170 www.graef-usa.com Village of Sugar Grove Interchange Feasibility Study I-88/IL Rte. 47 Full Interchange TABLE OF CONTENTS EXECUTIVE SUMMARY Page No. 1-4 1.0 INTRODUCTION Page No. 5-10 1.1 Purpose of the Study 1.2 Report Organization 1.3 History of the Project 1.4 Previous Reports 1.5 Description of the Study Area 1.6 Project Scope 1.7 Study Limitations 1.8 Acknowledgements 2.0 PURPOSE AND NEED Page No. 11-12 2.1 Traffic Benefit 2.2 Social and Economic Demands 2.3 Interchange Spacing Requirements 3.0 EXISTING CONDITIONS Page No. 13-16 3.1 Traffic 3.2 Roadway 3.3 Lighting 3.4 Structural 3.5 Existing Utilities 3.6 Land Use 3.7 Existing Right-of-Way 3.8 Environmental Conditions 4.0 INTERCHANGE LAYOUTS Page No. 17-27 4.1 Option 1 – Conventional Diamond Interchange 4.2 Option 2 – Northeast Loop Ramp 4.3 Option 3 – Eastbound I-88 Loop Off-Ramp 4.4 Option 4 – Single Point Urban Interchange (SPUI) 4.5 Option 5 – Diverging Diamond Interchange 4.6 Option 6 - No-Build Alternative 4.7 Feasibility Discussion 4.8 Ultimate Interchange Alternates 4.9 AET (All Electronic Tolling) vs. Cash Tolling 5.0 TRAFFIC EVALUATION OF INTERCHANGE DESIGN ALTERNATIVES Page No. 28-33 5.1 Projected Traffic Volumes 5.2 Traffic Analysis of the System 5.3 Access Control Limitations 6.0 COMPATIBILITY WITH LOCAL AND REGIONAL PLANNING Page No. 34-36 6.1 Design Standards 6.2 Support of Local Jurisdictions and Regional Planning Agencies 6.3 Compatibility with Local and Regional Planning 7.0 PROJECT COST AND POTENTIAL FUNDING SOURCES Page No. 37 7.1 Probable Cost of Construction 7.2 Potential Funding Sources Table of Contents- Page i Village of Sugar Grove Interchange Feasibility Study I-88/IL Rte. 47 Full Interchange 8.0 CONCLUSION Page No. 38-39 8.1 Impetus for the Interchange 8.2 Recommended Interchange Configuration 8.3 Next Steps APPENDICES Appendix A Environmental Analysis for Interchange Study at Interstate Route 88 and Illinois Rte 47 Appendix B Illinois Tollway and IDOT Geometric Design Criteria Appendix C Toll Plaza Design Criteria Appendix D Agency Meeting Correspondence Appendix E Interchange Volumes Study Appendix F HCS Worksheets and Synchro Reports o F-I Existing Freeway Capacity Reports o F-II Existing Ramp Capacity Reports o F-III Existing Intersection Capacity Reports o F-IV 2020 Freeway Capacity Reports o F-V 2020 Ramp Capacity Reports o F-VI 2020 AM – Diamond Interchange Capacity Report o F-VII 2020 PM – Diamond Interchange Capacity Report o F-VIII 2030 Freeway Capacity Reports o F-IX 2030 Ramp Capacity Reports o F-X 2030 AM – Diamond Interchange Capacity Report o F-XI 2030 PM – Diamond Interchange Capacity Report o F-XII 2030 AM – Northeast Loop Ramp Interchange Capacity Report o F-XIII 2030 PM – Northeast Loop Ramp Interchange Capacity Report o F-XIV 2030 AM – SPUI Interchange Capacity Report o F-XV 2030 PM – SPUI Interchange Capacity Report o F-XVI 2030 AM – DDI Interchange Capacity Report o F-XVII 2030 PM – DDI Interchange Capacity Report o F-XVIII 2030 AM – Finley Three-Quarter Access Capacity Report o F-XIX 2030 PM – Finley Three-Quarter Access Capacity Report o F-XX 2030 AM – DDI Interchange Capacity Report o F-XXI 2030 PM – DDI Interchange Capacity Report Appendix G Agency Correspondence o G-I Single vs. Dual Left-Turn Lane Evaluation Appendix H Support Resolutions of Local Jurisdictions Appendix I Construction Cost Analysis o I-I Project Unit Cost Development o I-II Conventional Diamond Interchange Detailed Cost Estimate o I-III Northeast Loop Ramp Interchange Detailed Cost Estimate o I-IV Single Point Urban Interchange Detailed Cost Estimate o I-V Diverging Diamond Interchange Detailed Cost Estimate Appendix J Zoning and Transportation Maps o Village of Sugar Grove – 2008 Zoning Map o Village of Sugar Grove – Future Land Use Plan o Village of Elburn – Zoning District Map o Village of Sugar Grove – Transportation Plans o Illinois 47 Corridor Study – Capitol Improvements & Proposed SRA Cross Section Appendix K Previous Reports – I-88/Illinois Rte. 47 Interchange Completion Analysis, CEMCON, Ltd. Table of Contents- Page ii Village of Sugar Grove Interchange Feasibility Study I-88/IL Rte. 47 Full Interchange EXHIBITS Exhibit 1 2030 Conventional Diamond Interchange Exhibit 2 2030 Diamond Interchange with NE Loop Ramp Exhibit 3 2030 Single Point Urban Interchange (SPUI) Exhibit 4 2030 Diverging Diamond Interchange Exhibit 5 Existing Half Diamond Interchange Exhibit 6 Illinois Route 47 Access Control Exhibit Exhibit 7 Diamond & NE Loop Ramp Interchange Design ROW Display Exhibit 8 SPUI Interchange Design ROW Display Exhibit 9 Diverging Diamond Interchange Design ROW Display Exhibit 10 I-88 at IL Rte 47 Existing Bridge Section Exhibit 11 Illinois Route 47 Proposed Typical Sections Exhibit 12 Ramp Typical Sections Exhibit 13 2030 Seavey Road Design after Redevelopment Exhibit 14 2030 Conventional Diamond Interchange – Cash and IPass Tolling Option Exhibit 15 2030 Conventional Diamond Interchange – Alternate Suburban Design Exhibit 16 Diamond Interchange Design ROW Display - Alternate Suburban Design Exhibit 17 Illinois Route 47 Proposed Typical Sections – Alternate Suburban Design Exhibit 18 Finley Road NB Left Sight Distance Table of Contents- Page iii Village of Sugar Grove IL RTE 47/I-88 Interchange Feasibility Study IL RTE 47/I-88 INTERCHANGE FEASIBILITY STUDY EXECUTIVE SUMMARY 1. PROJECT IDENTIFICATION The “I-88/Illinois Route 47 Full Interchange Feasibility Study” has been prepared to provide an analysis and evaluation of several interchange configurations. The Village of Sugar Grove is the lead agency for the study with significant financial support from Crown Community Development. All options consider adding ramps to and from the east, as the Village of Sugar Grove desires to investigate the feasibility of a full interchange. The investigation presented herein provides several alternatives for the proposed improvements. Of the five alternates investigated for a full service interchange at IL Rte. 47, the alternate deemed most feasible under the operational and financial constraints of the project is the Conventional Diamond Interchange. The purpose of this report is to assess the conditions of the project location, analyze existing and projected (2020 & 2030) traffic, and identify feasible designs for use in future phases of study. The next step in the project would be the development of a Phase I Report. The project is located in southern Kane County in Blackberry Township. The Village of Sugar Grove is located south of the interchange and the Village of Elburn is located to the north. The interchange is located at milepost 109.5 on the Reagan Memorial Tollway (I-88). This is approximately 15.5 miles east of the Peace Road interchange and 4 miles west of the IL Rte. 56 system interchange. The project will include the addition of ramps to and from the east, as well as a partial reconstruction of the existing ramps to and from the west. New toll plazas are proposed to be constructed on all ramps of the proposed interchange. The purpose of the project is to provide a safe full access facility that will improve connectivity to the interstate network while also meeting the development goals of the adjacent communities. Planning documents from the Village of Sugar Grove, Village of Elburn, and the Chicago Metropolitan Agency for Planning (CMAP) indicate a tremendous potential for residential and commercial/industrial development with associated traffic growth in the project area over the next several years. This facility will help to address the inappropriate usage of local roadways by regional traffic. Kane County supports the full interchange as integral to their land use and transportation planning, as evidenced by their Long Range Transportation plan. Record drawings, highway plats, aerial photography, contour mapping, and utility atlases were utilized to develop existing conditions presented in the report exhibits. 2. RESULTS OF THE INVESTIGATON The major design characteristics addressed in this report include: Environmental Impacts, Existing Infrastructure Impacts, Traffic Operations, Roadside Safety, Toll Plaza Locations and Operations, Right-of-Way Acquisition, and Project Cost. These design characteristics are not listed in order of importance. Environmental Impacts: Environmental issues are addressed in Section 3.8 and Appendix A. Issues addressed include wetlands, water quality, floodplains, threatened and endangered species, and potential hazardous materials. Nothing in the environmental investigation precludes the development of the full service interchange. Existing Infrastructure Impacts: The infrastructure being evaluated includes IL Rte. 47, the Reagan Memorial Tollway, and the existing IL Rte. 47 Bridge over I-88. An inventory of roadway lighting and utilities was also included. Significant reconstruction of the aforementioned roadways 1 Village of Sugar Grove IL RTE 47/I-88 Interchange Feasibility Study will be necessary. Fiber optic cables, electrical lines, telephone lines, and gas facilities all exist within the project area. No significant impacts to existing utilities are anticipated with the construction. Please see Section 3.5 for information regarding existing utilities in the project vicinity. Traffic Operations: The geometry of the existing I-88/IL Rte. 47 Interchange is a half diamond interchange with ramps connecting I-88 Eastbound to Rte. 47 and Rte. 47 to I-88 Westbound. The current design arrangement does not allow traffic movements from Rte. 47 to I-88 Eastbound or from I-88 Westbound to Rte. 47. This configuration does not meet motorists’ expectations for full service interchange. All of the full interchange designs considered in this study are expected to provide sufficient capacity to manage traffic volumes projected through the 2030 design year.