ACCESS JUSTIFICATION REPORT I-57 / IL 14 Interchange Modifications Franklin County, Illinois Prepared for: City of Benton Prepared by: HMG Engineers, Inc., Carlyle, Illinois I-57 / IL 14 Interchange Modifications Access Justification Report 1 INTRODUCTION .................................................................................................. I 1-1 DESCRIPTION OF STUDY AREA ................................................................ 2 1-2 DESCRIPTION OF REPORT ....................................................................... 2 1-3 NO-BUILD OPTION ................................................................................. 6 1-4 SPLIT DIAMOND-BUILD OPTION ............................................................... 6 a. Interim Phase ............................................................................... 8 b. Full Build Phase ......................................................................... 13 2 PURPOSE ......................................................................................................... 14 2-1 FREIGHT MOVEMENT ............................................................................ 15 2-2 IMPACT TO LOCAL ROADWAYS AND THE LOCAL COMMUNITY ..................... 21 2-3 U.S. CORPS OF ENGINEERS FACILITIES AT REND LAKE ............................ 23 3 COST ................................................................................................................. 25 4 BACKGROUND INFORMATION ....................................................................... 27 4-1 GENERAL BACKGROUND INFORMATION .................................................. 27 4-2 REGIONAL EMPLOYMENT INFORMATION .................................................. 27 4-3 PROJECT STAKEHOLDERS ..................................................................... 28 4-4 PROJECT SCHEDULE AND FUNDING ....................................................... 28 5 CONCERNS ...................................................................................................... 28 5-1 ENVIRONMENTAL ................................................................................. 28 5-2 SAFETY ............................................................................................... 28 6 COMMUNITIES ................................................................................................. 28 7 CONNECTIONS ................................................................................................ 29 8 DESIGN EXCEPTIONS ..................................................................................... 29 9 TRAFFIC SIGNALS / SIGNING ......................................................................... 31 10 LANE BALANCE ............................................................................................... 36 11 EXISTING FACILITIES (FHWA POLICY POINT #1) ......................................... 36 HMG Engineers, Inc. i June 2015 I-57 / IL 14 Interchange Modifications Access Justification Report 12 TRANSPORTATION SYSTEM MANAGEMENT (FHWA POLICY POINT #2) .. 38 12-1 TSM CONSIDERATIONS ........................................................................ 38 12-2 LOCAL SYSTEM CONSIDERATIONS ......................................................... 38 12-3 PEDESTRIAN CONSIDERATIONS ............................................................. 39 13 ACCESS CONNECTIONS AND DESIGN (FHWA POLICY POINT #4) ............. 40 13-1 FULL INTERCHANGE ............................................................................. 40 13-2 PROPOSED DESIGN .............................................................................. 40 14 TRANSPORTATION LAND USE PLANS (FHWA POLICY POINT #5) ............. 46 15 COMPREHENSIVE INTERSTATE NETWORK STUDY (FHWA POLICY POINT #6) ............................................................................... 48 16 COORDINATION WITH TRANSPORTATION SYSTEM IMPROVEMENTS (FHWA POLICY POINT #7) ............................................................................... 48 17 STATUS OF PLANNING AND NEPA (FHWA POLICY POINT #8) ................... 49 17-1 SOCIAL/ECONOMIC/ENVIRONMENTAL JUSTICE ........................................ 49 17-2 FARMLAND IMPACTS (TYPE AND AREA) .................................................. 49 17-3 WETLAND AND WATERBODY IMPACTS .................................................... 49 17-4 GEOLOGICAL ISSUES/SUBSURFACE MINING ACTIVITY .............................. 50 17-5 FLOOD PLAIN IMPACTS ......................................................................... 50 17-6 NOISE IMPACTS ................................................................................... 50 17-7 CULTURAL RESOURCES/SECTION 4(F)/6(F) ............................................ 51 17-8 THREATENED AND ENDANGERED SPECIES .............................................. 51 17-9 SPECIAL WASTE .................................................................................. 51 18 OPERATIONAL ANALYSIS (FHWA POLICY POINT #3) ................................. 52 18-1 SUMMARY OF CRASH HISTORY .............................................................. 52 a. I-57 Corridor ............................................................................... 55 b. Five Percent Freeway Sections .................................................. 58 c. IL-14 Ramps ............................................................................... 60 d. Rest Area Ramps ....................................................................... 60 HMG Engineers, Inc. ii June 2015 I-57 / IL 14 Interchange Modifications Access Justification Report e. IL Route 14 Ramp Terminals ...................................................... 60 18-2 ENHANCED INTERCHANGE SAFETY ANALYSIS TOOL (ISATE) ANALYSIS ..... 61 18-3 SAFETY ANALYSIS SUMMARY ................................................................ 65 18-4 OPERATIONS ....................................................................................... 65 a. Freeway Operations ................................................................... 65 b. Intersection Operations .............................................................. 66 19 INTERCHANGE LOCATION MAP .................................................................... 67 20 HIGHWAY CAPACITY ANALYSIS.................................................................... 68 20-1 EXISTING PEAK HOUR VOLUMES ........................................................... 68 20-2 DESIGN YEAR “NO-BUILD” PEAK HOUR VOLUMES ................................... 70 20-3 DESIGN YEAR “FULL BUILD & INTERIM” PEAK HOUR VOLUMES ................. 71 20-4 SUMMARY OF OPERATIONAL ANALYSIS................................................... 76 a. Basic Freeway Segments Analyses of Existing Conditions .................................................................................. 78 b. Basic Freeway Segments Analyses of the Design Year “No-Build” Conditions ................................................................. 80 c. Basic Freeway Segments Analyses of the Design Year “Full-Build” Conditions ................................................................ 82 d. Basic Freeway Segments Analyses of the Design Year “Interim-Build” Conditions ........................................................... 83 e. Intersection Analyses of the Existing Conditions ........................ 84 f. Intersection Analyses of the 2035 Design Year “No- Build” Conditions ........................................................................ 88 g. Intersection Analyses of the Design Year “Full Build” Conditions .................................................................................. 92 h. Intersection Analyses of the Design Year “Interim Build” Conditions .................................................................................. 98 i. Weave Area Analyses of the Existing Conditions ..................... 100 HMG Engineers, Inc. iii June 2015 I-57 / IL 14 Interchange Modifications Access Justification Report j. Weave Area Analyses of the Design Year “No-Build” Conditions ................................................................................ 101 k. Weave Area Analyses of the Design Year “Full Build” Conditions ................................................................................ 101 l. Weave Area Analyses of the Design Year “Interim Build” Conditions ...................................................................... 101 20-5 CONDITIONS ANALYSIS SUMMARY........................................................ 102 HMG Engineers, Inc. iv June 2015 I-57 / IL 14 Interchange Modifications Access Justification Report LIST OF TABLES TABLE 3-1: COST SPREADSHEETS .................................................................................................................................. 26 TABLE 18-1: CRASHES BY ROADWAY TYPE BASED ON SEVERITY .......................................................................................... 53 TABLE 18-2: NUMBER OF CRASHES IN STUDY AREA BY ROADWAY TYPE BASED ON CRASH TYPE ............................................... 53 TABLE 18-3: PERCENTAGE OF CRASHES IN STUDY AREA BY ROADWAY TYPE BASED ON CRASH TYPE .......................................... 54 TABLE 18-4: PERCENTAGES OF CRASHES BASED ON LIGHTING CONDITION (NO ANIMALS) ........................................................ 54 TABLE 18-5: PERCENTAGE OF CRASHES BASED ON SURFACE CONDITION (NO ANIMALS) .......................................................... 54 TABLE 18-6: PERCENTAGE OF CRASHES BASED ON WEATHER (NO ANIMALS) .......................................................................