FINAL Traffic Analysis Technical Report I-5 Rose Quarter Improvement Project Oregon Department of Transportation January 8, 2019 Traffic Analysis Technical Report Oregon Department of Transportation Contents Acronyms and Abbreviations ........................................................................................................ v Ex ec utive Summary .............................................................................................................. ES-1 1 Introduction .......................................................................................................................1 1.1 Project Location.........................................................................................................1 1.2 Project Purpose .........................................................................................................1 1.3 Project Need .............................................................................................................1 1.4 Project Goals and Objectives .......................................................................................5 2 Project Alternatives.............................................................................................................6 2.1 No-Build Alternative....................................................................................................6 2.2 Build Alternative.........................................................................................................8 2.2.1 I-5 Mainline Improvements ...............................................................................9 2.2.2 Highway Covers ........................................................................................... 10 2.2.3 Broadway/Weidler Interchange Improvements .................................................. 14 2.2.4 Related Local System Multimodal Improvements ............................................... 16 3 Regulatory Framework ...................................................................................................... 20 3.1 Federal Plans and Policies ........................................................................................ 20 3.1.1 ADA Guide .................................................................................................. 20 3.1.2 Federal Highway Administration (FHWA) Bicycle and Pedestrian Guides .............. 20 3.2 State Laws, Plans, and Policies.................................................................................. 20 3.2.1 Oregon Transportation Plan ........................................................................... 20 3.2.2 Oregon Highway Plan ................................................................................... 21 3.2.3 ODOT Highway Design Manual ...................................................................... 21 3.2.4 Division 51: Access Management Rules ........................................................... 22 3.3 Regional and Local Plans.......................................................................................... 22 3.3.1 TriMet Plans ................................................................................................ 22 3.3.2 City of Portland Transportation System Plan and Mixed-Used Multi-Modal Plan............................................................................................................ 22 3.3.3 Go Lloyd ..................................................................................................... 23 3.4 Other Relevant Guidance .......................................................................................... 23 3.4.1 American Association of State Highway and Transportation Officials (AASHTO) ................................................................................................... 23 3.4.2 National Association of City Transportation Officials Urban Street Design Guide.......................................................................................................... 24 4 Methodology and Data Sources .......................................................................................... 25 4.1 Project Area and Area of Potential Impact.................................................................... 25 4.2 Resource Identification and Evaluation ........................................................................ 25 4.2.1 Study Intersections ....................................................................................... 25 4.2.2 Traffic Volumes ............................................................................................ 28 4.3 Ass ess ment of Impac ts ............................................................................................. 30 4.3.1 Operational Criteria ....................................................................................... 30 4.3.2 Mobility Standards ........................................................................................ 31 4.3.3 Traffic Operations Software ............................................................................ 31 4.4 Cumulative Impacts.................................................................................................. 39 January 8, 2019 | i Traffic Analysis Technical Report Oregon Department of Transportation 75 Affected Environment........................................................................................................ 40 5.1 Existing Highway Traffic Operations............................................................................ 40 5.1.1 HCS Results ................................................................................................ 40 5.1.2 Lane-by-Lane Speed..................................................................................... 42 5.1.3 Highway Travel Time..................................................................................... 45 5.2 Existing Local Street Traffic Operations ....................................................................... 47 5.2.1 Sy nc hro Analys is Res ults............................................................................... 47 5.2.2 VISSIM Analysis Results ............................................................................... 49 5.2.3 Streetcar Travel Time .................................................................................... 51 5.2.4 Bic yc le Delay ............................................................................................... 51 6 Environmental Consequences ............................................................................................ 53 6.1 No-Build Alternative.................................................................................................. 53 6.1.1 Direct Impacts .............................................................................................. 53 6.1.2 Indirect Impacts ............................................................................................ 53 6.2 Build Alternative....................................................................................................... 53 6.2.1 Short-Term Construction Impacts .................................................................... 54 6.2.2 Long-Term and Operational Direct Impacts....................................................... 54 6.2.3 Long-Term and Operational Indirect Impacts..................................................... 80 6.3 Cumulative Effects ................................................................................................... 81 6.3.1 Spatial and Temporal Boundaries ................................................................... 82 6.3.2 Past, Present, and Reasonably Foreseeable Future Actions................................ 82 6.3.3 Results of Cumulative Impact Analysis............................................................. 83 6.4 Conclusions ............................................................................................................ 84 7 Avoidance, Minimization, and Mitigation Measures ................................................................ 85 8 Contacts and Coordination................................................................................................. 86 9 Preparers ........................................................................................................................ 87 10 References...................................................................................................................... 89 Tables Table 1. I-5 Ramps in the Project Area ...........................................................................................7 Table 2. Weave Distances within the Project Area............................................................................7 Table 3. Traffic Volume Summary – Existing Condition 8:00-9:00 AM ............................................... 36 Table 4. Traffic Volume Summary – Existing Condition 5:00-6:00 PM ............................................... 37 Table 5. HCS Analysis Results: Existing First Peak Hour AM (PM) ................................................... 41 Table 6. HCS Analysis Results: Existing Second Peak Hour AM (PM)............................................... 41 Table 7. Existing Conditions - Travel Time (minutes) ...................................................................... 45 Table 8. Synchro Analysis Results: Existing AM Peak Period........................................................... 48 Table 9. Synchro Analysis Results: Existing PM Peak Period..........................................................