Traffic Impact Study Proposed Ipark Expansion
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Traffic Impact Study Proposed iPark Expansion 761 Main Avenue City of Norwalk/Town of Wilton, CT PREPARED FOR: iPark II Norwalk, LLC 485 West Putnam Avenue Greenwich, CT PREPARED BY: Kimley-Horn and Associates, Inc. 1 North Lexington Avenue, Suite 505 White Plains, NY 10601 914.368.9200 March 2021 Revised May 2021 Project Number 112093000 Proposed iPark Expansion Traffic Impact Study Traffic Impact Study Proposed iPark Expansion 761 Main Avenue City of Norwalk/Town of Wilton, CT PREPARED FOR: iPark II Norwalk, LLC 485 West Putnam Avenue Greenwich, CT PREPARED BY: Kimley-Horn and Associates, Inc. 1 North Lexington Avenue, Suite 505 White Plains, NY 10601 914.368.9200 Kimley‐Horn and Associates, Inc. _________________________________ March 2021/Revised May 2021 John Canning Date 1120933000 CT PE Number: 0028017 05/24/21 The entirety of this document, including text and images, is property of Kimley‐Horn and Associates, Inc., protected under U. S. copyright law. Copyright © 2017 Kimley‐Horn and Associates, Inc. 112093000 Page ii March 2021, Revised May 2021 Proposed iPark Expansion Traffic Impact Study TABLE OF CONTENTS 1.0 EXECUTIVE SUMMARY ................................................................................................................. 1 1.1 Project Description .................................................................................................................... 1 1.2 Study Methodology .................................................................................................................... 1 1.3 Findings ..................................................................................................................................... 3 1.4 Conclusions ............................................................................................................................... 5 2.0 INTRODUCTION .............................................................................................................................. 6 3.0 EXISTING CONDITIONS ................................................................................................................. 8 3.1 Roadway Network ..................................................................................................................... 8 3.2 Description of Study Intersections ............................................................................................. 9 3.3 Multi-Modal Transportation ...................................................................................................... 10 3.4 Crash History and Safety Assessment .................................................................................... 11 3.5 Traffic Data Collection ............................................................................................................. 11 4.0 FUTURE BACKGROUND CONDITIONS ..................................................................................... 14 4.1 Background Traffic Volumes ................................................................................................... 14 4.2 Contemplated Future Roadway Improvements ....................................................................... 24 5.0 PROJECT TRAFFIC ...................................................................................................................... 25 5.1 Trip Generation ........................................................................................................................ 25 5.2 Trip Distribution and Assignment ............................................................................................ 26 6.0 FUTURE COMBINED TRAFFIC CONDITIONS ............................................................................ 31 7.0 CAPACITY ANALYSIS .................................................................................................................. 34 7.1 Intersection Capacity Analysis ................................................................................................. 34 7.2 Traffic Impact Evaluation ......................................................................................................... 44 7.3 Queue Analysis ....................................................................................................................... 47 8.0 CONCLUSIONS ............................................................................................................................. 53 APPENDIX 2019 Traffic Counts CTDOT 2025 Background Traffic Volumes and Email correspondence Crash Records Summary Synchro Capacity Analyses Signal Timing Plans 112093000 Page iii March 2021, Revised May 2021 Proposed iPark Expansion Traffic Impact Study FIGURES Figure 1 – Project Location ........................................................................................................................... 7 Figure 2 – Existing Traffic Volumes ............................................................................................................ 13 Figure 3 – 2022 Grown Traffic Volumes ..................................................................................................... 15 Figure 4 – Vicinity Development Traffic Volumes – Grist Mill Village ......................................................... 16 Figure 5 – Vicinity Development Traffic Volumes – BLT North 7 ................................................................ 17 Figure 6 – Vicinity Development Traffic Volumes – Innovation Center ...................................................... 18 Figure 7 – Vicinity Development Traffic Volumes – Wilton Corporate Park ............................................... 19 Figure 8 – 2022 Background Traffic Volumes............................................................................................. 20 Figure 9 – Adjusted CTDOT 2025 Traffic Volumes .................................................................................... 22 Figure 10 – 2025 Background Traffic Volumes........................................................................................... 23 Figure 11 – Residential Trip Distributions ................................................................................................... 27 Figure 12 – Hotel Trip Distributions ............................................................................................................ 28 Figure 13 – Residential Project Trips .......................................................................................................... 29 Figure 14 – Hotel Project Trips ................................................................................................................... 30 Figure 15 – 2022 Combined Traffic Volumes ............................................................................................. 32 Figure 16 – 2025 Combined Traffic Volumes ............................................................................................. 33 112093000 Page iv March 2021, Revised May 2021 Proposed iPark Expansion Traffic Impact Study TABLES Table 1 – Crash Summary .......................................................................................................................... 11 Table 2 – Trip Generation ........................................................................................................................... 25 Table 3 – LOS Criteria ................................................................................................................................ 35 Table 4 – Existing Conditions – Intersection Capacity Analysis Results .................................................... 36 Table 5 – 2022 Background Conditions – Intersection Capacity Analysis Results .................................... 37 Table 6 – 2022 Combined Conditions – Intersection Capacity Analysis Results ....................................... 38 Table 7 – 2025 Background Conditions – Intersection Capacity Analysis Results .................................... 39 Table 8 – 2025 Combined Conditions – Intersection Capacity Analysis Results ....................................... 40 Table 9 – 2022 Background vs. 2022 Combined Improved Conditions - AM Peak Hour Intersection Capacity Analysis Results ........................................................................................................................... 45 Table 10 – 2022 Background vs. 2022 Combined Improved Conditions - PM Peak Hour - Intersection Capacity Analysis Results ........................................................................................................................... 46 Table 11 – 95th Percentile Queuing Summary – Existing, 2022 Background & 2022 Combined Conditions .................................................................................................................................................................... 48 Table 12 - 95th Percentile Queuing Summary – 2025 Background & 2025 Combined Conditions ............ 49 112093000 Page v March 2021, Revised May 2021 Proposed iPark Expansion Traffic Impact Study 1.0 EXECUTIVE SUMMARY This report has been prepared by Kimley-Horn and Associates, Inc. to document the potential traffic impacts associated with a proposed expansion to the iPark development at 761 Main Avenue (US Route 7) on the border of the City of Norwalk and the Town of Wilton. (the “Project”). This traffic impact study evaluated existing and future traffic conditions surrounding the site both with and without the Project. The anticipated year of completion of this development is 2022, although to be conservative, this report also provides