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TRANSPORTATION SITE IMPACT HANDBOOK Estimating the Transportation Impacts of Growth

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TRANSPORTATION SITE IMPACT HANDBOOK Estimating the Transportation Impacts of Growth TRANSPORTATION SITE IMPACT HANDBOOK Estimating the Transportation Impacts of Growth STATE OF FLORIDA DEPARTMENT OF TRANSPORTATION SYSTEMS PLANNING OFFICE 605 SUWANNE STREET, MS 19 TALLAHASSEE, FLORIDA 32399‐0450 www.dot.state.fl.us/planning Transportation Site Impact Handbook April 2014 We have tried to have the most up to date information. However, due to changes in legislation and acceptable practices, we recommend you check with the links in this handbook. | 2 Contents Transportation Site Impact Handbook April 2014 Contents 1 Introduction ................................................................................................................................................7 1.1 Purpose of Handbook ...................................................................................................................7 1.2 Background ..................................................................................................................................9 1.2.1 Why is a Transportation Impact Analysis Needed? ................................................................... 11 1.2.2 The FDOT Reviewer’s Role ......................................................................................................... 12 1.3 About this Handbook .................................................................................................................. 13 1.4 Updates to this Handbook .......................................................................................................... 15 1.4.1 State Transportation Facilities and Concurrency ...................................................................... 16 2 The Transportation Impact Process ............................................................................................................ 17 2.1 Introduction ...............................................................................................................................17 2.1.1 Considerations for the Components of a Transportation Impact Study ................................... 19 2.2 Methodology Development ....................................................................................................... 21 2.2.1 Study Area Requirements .......................................................................................................... 21 2.2.2 Time Horizons – Analysis Years ................................................................................................. 23 2.2.3 Travel Adjustment Factors ......................................................................................................... 25 2.2.4 Standard “K” Factors ................................................................................................................. 29 2.3 Existing Conditions Analysis and Data Collection ......................................................................... 30 2.3.1 Data Collection .......................................................................................................................... 30 2.3.2 Proposed Site Development Characteristics ............................................................................. 31 2.3.3 Existing Transportation System Data ......................................................................................... 31 2.3.4 Traffic Counts and other Transportation Data .......................................................................... 33 2.3.5 Land Use and Demographic Data for Large Scale Models ......................................................... 36 2.4 Trip Generation of the New Development ................................................................................... 38 2.4.1 Trip Generation Data ................................................................................................................. 38 2.4.2 Use of Trip Generation Rates or Equations ............................................................................... 41 2.4.3 Trip Types .................................................................................................................................. 41 2.4.4 Explanation of the 10 Percent of the Adjacent Street Traffic ................................................... 44 2.4.5 Pass-by Trips and Model Volumes ............................................................................................. 46 2.4.6 Limitations of Trip Generation Data .......................................................................................... 48 2.4.7 Internal Capture Rates for Multi Use Developments ................................................................ 50 2.4.8 Community Capture .................................................................................................................. 55 2.5 Projecting Future Conditions ....................................................................................................... 59 2.5.1 Projecting Future Background Traffic ........................................................................................ 59 2.5.2 The Growth Rate/Trend Method for Projecting Background Traffic ........................................ 60 2.5.3 Build-Up Method ....................................................................................................................... 66 2.5.4 Model Methods Using FSUTMS to Distribute Trips for Developments ..................................... 66 2.6 Trip Distribution ......................................................................................................................... 70 2.6.1 Different Types of Manual Methods for Trip Distribution ........................................................ 70 2.7 Mode Split/Alternative Travel Forecasts ..................................................................................... 72 We have tried to have the most up to date information. However, due to changes in legislation and acceptable practices, we recommend you check with the links in this handbook. | 3 Contents Transportation Site Impact Handbook April 2014 2.8 Trip Assignment ......................................................................................................................... 73 2.8.1 General Considerations ............................................................................................................. 73 2.8.2 Manual Methods of Trip Assignment ........................................................................................ 75 2.8.3 Traffic Attenuation with Manual Traffic Assignment ................................................................ 76 2.8.4 Model Methods of Trip Assignment .......................................................................................... 77 2.8.5 Trip Assignment at Intersections ............................................................................................... 80 2.8.6 Documentation of Trip Assignment ........................................................................................... 80 2.9 Access Management, Site Access, and Internal Circulation ........................................................... 81 2.10 Mitigation and Future Transportation Needs ............................................................................. 83 2.10.1 LOS Analysis Tools ................................................................................................................... 84 2.10.2 Bicycle & Pedestrian LOS Analysis ........................................................................................... 84 2.10.3 Detailed Transit and Multimodal Quality of Service Tools ...................................................... 85 2.11 Multimodal References ............................................................................................................. 86 3 Local Government Comprehensive Plan Reviews ....................................................................................... 87 3.1 Comprehensive Plans and Plan Amendments .............................................................................. 87 3.1.1 Introduction to Growth Management and Comprehensive Plans ............................................ 87 3.2 The Comprehensive Plan Amendment Process ............................................................................ 90 3.2.1 Expedited State Review Process ................................................................................................ 90 3.2.2 State Coordinated Review Process ............................................................................................ 91 3.2.3 Small Scale Amendment Process ............................................................................................... 93 3.2.4 Future Land Use Map (FLUM) .................................................................................................... 93 3.2.5 Agency Roles .............................................................................................................................. 94 3.3 Review of Future Land Use Map (FLUM) Amendments ................................................................ 95 3.3.1 Legal Authorities ........................................................................................................................ 96 3.3.2 Review Procedure ...................................................................................................................... 96 3.4 Review of Text Amendments .................................................................................................... 100 3.4.1 Review Procedures .................................................................................................................
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