User Guide for the Vermont Transportation Resilience Planning Tool (TRPT) (Version 1.0)
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User Guide for the Vermont Transportation Resilience Planning Tool (TRPT) (Version 1.0) State of Vermont January 31, 2019 Copyright 2019 Milone & MacBroom, Inc. User Guide for the Vermont Transportation Resilience Planning Tool (TRPT) (Version 1.0) State of Vermont MMI #3594‐04‐05 January 31, 2019 Prepared for: Vermont Agency of Transportation Montpelier, Vermont 05633 vtrans.vermont.gov/planning Prepared by: MILONE & MACBROOM, INC. Waterbury, Vermont 05676 www.mminc.com In Collaboration with: Fitzgerald Environmental DuBois & King Smart Mobility Stone Environmental www.fitzgeraldenvironmental.com www.dubois‐king.com www.smartmobility.com www.stone‐env.com TABLE OF CONTENTS ACKNOWLEDGEMENTS ................................................................................................................................ iv RECOMMENDED CITATION ........................................................................................................................... v 1.0 INTRODUCTION ..................................................................................................................................... 1 1.1 Background ................................................................................................................................ 1 1.2 Brief Overview of the TRPT ....................................................................................................... 2 1.3 Audience .................................................................................................................................... 3 1.4 Uses ........................................................................................................................................... 4 1.5 How to Use this Guide ............................................................................................................... 4 2.0 PRIMARY DATA ..................................................................................................................................... 5 2.1 Primary Data .............................................................................................................................. 5 2.1.1 Roads ..................................................................................................................................... 5 2.1.2 Bridges and Culverts ............................................................................................................. 6 2.1.3 Tropical Storm Irene Damages .............................................................................................. 6 2.1.4 Rivers ..................................................................................................................................... 7 3.0 VULNERABILITY (V) ............................................................................................................................... 8 3.1 Overview/Definition .................................................................................................................. 8 3.2 Scoring Overview ....................................................................................................................... 8 3.3 Vulnerability Processes ........................................................................................................... 10 3.4 Flood Sizes ............................................................................................................................... 12 3.5 Failure Types ............................................................................................................................ 12 3.6 Variables .................................................................................................................................. 14 4.0 CRITICALITY (C) .................................................................................................................................... 16 4.1 Overview/Definition ................................................................................................................ 16 4.2 Refinement of the Statewide Travel Demand Model ............................................................. 16 4.3 Network Criticality Index (NCI) ................................................................................................ 17 4.4 Critical Closeness Accessibility Index (CCA) ............................................................................. 18 4.5 Locally Identified Important Roads ......................................................................................... 18 4.6 Scoring ..................................................................................................................................... 19 5.0 RISK (R) ................................................................................................................................................ 20 5.1 Overview/Definition ................................................................................................................ 20 5.2 Scoring ..................................................................................................................................... 20 Vermont Transportation Resilience Planning Tool i January 31, 2019 6.0 MITIGATION (M) ................................................................................................................................. 21 6.1 Overview/Definition ................................................................................................................ 21 6.2 Watershed Resiliency Planning Case Studies .......................................................................... 23 7.0 THE TRPT APP ...................................................................................................................................... 24 7.1 Overview.................................................................................................................................. 24 7.2 TRPT Instructions ..................................................................................................................... 24 7.3 Flood Damage Case Study ....................................................................................................... 33 7.4 Planning Case Study ................................................................................................................ 37 8.0 CITED REFERENCES ............................................................................................................................. 41 LIST OF TABLES 2‐1 Road Network Original Datasets .......................................................................................................... 5 2‐2 Structures Original Datasets ................................................................................................................ 6 2‐3 Damages Original Datasets .................................................................................................................. 6 2‐4 River Corridor Original Datasets .......................................................................................................... 7 3‐1 Summary of Vulnerability Scoring ........................................................................................................ 9 3‐2 Flood Vulnerability Types ................................................................................................................... 11 3‐3 Summary of Flood Recurrence Intervals Assessed in Vulnerability Scoring ...................................... 12 3‐4 Failure Definitions and DDIR Images of Each Failure Mode .............................................................. 13 3‐5 Variables Used in Vulnerability Screens for Inundation, Erosion, and Deposition ............................ 15 4‐1 Variables and Scoring for the Criticality Screen ................................................................................. 19 6‐1 Practice Filtering Available on the TRPT ............................................................................................ 23 B‐1 SGA Data Availability in the Three Pilot Subwatersheds ................................................................. B‐4 C‐1 Failure Definitions Applied to Embankment, Bridges, and Culverts ................................................. C‐1 D‐1 Damage Data Used in Vulnerability Scoring for the Pilot Watersheds............................................ D‐4 F‐1 Vulnerability Scoring for Inundation, Erosion, and Deposition for Road Embankments, Bridges, and Culverts ........................................................................................................................ F‐5 F‐2 Joint Probability Calculation for Roads and Structures ................................................................... F‐11 F‐3 Estimated Failure Rate for Each Vulnerability Level ....................................................................... F‐12 LIST OF FIGURES 1‐1 Pilot watersheds used to create the TRPT ........................................................................................... 2 3‐1 Vulnerability screen by process and failure mode ............................................................................... 9 3‐2 Example map of maximum vulnerability scores for Whetstone Brook watershed ........................... 14 4‐1 Whetstone Brook subarea model including all state and local roads ............................................... 16 4‐2 Schematic of vulnerability‐based criticality showing low and high criticality scenarios ................... 17 4‐3 NCI captures trips that cannot be completed and delayed trips