IDGE P R RO B G K R L A A M Walk Bridge Program W Norwalk, CT Manresa Island Traffic Study October 2020 Prepared for: Connecticut Department of Transportation 2800 Berlin Turnpike Newington, Connecticut 06111 Prepared by: WSP USA 500 Winding Brook Drive Glastonbury, Connecticut 06033 The Walk Bridge Program Manresa Island Traffic Study Norwalk, CT October 2020 Table of Contents Table of Contents ............................................................................................................................................. i 1 1 Introduction .............................................................................................................................................. 1 1.1 Project Background ................................................................................................................................................................... 1 2 Roadway Information.............................................................................................................................. 5 2.1 Project Study Area Limits........................................................................................................................................................ 5 2.2 Existing Roadway and Intersection Geometry ..................................................................................................................... 6 2.2.1 Martin Luther King Jr. Drive & Monroe Street .................................................................................................................................. 6 2.2.2 South Main Street & Monroe Street/Hanford Place........................................................................................................... 7 2.2.3 South Main Street & Henry Street ........................................................................................................................................................ 8 2.2.4 South Main Street & Woodward Avenue/Concord Street............................................................................................................. 9 2.2.5 WOODWARD Avenue & Grove Street ................................................................................................................................................ 10 2.2.6 Woodward Avenue & route 136 (Burritt Avenue).......................................................................................................................... 11 2.2.7 Woodward Avenue & Route 136 (Meadows Street) ..................................................................................................................... 12 2.3 Land Use .................................................................................................................................................................................. 13 2.4 Multimodal Use....................................................................................................................................................................... 14 2.4.1 Pedestrian ................................................................................................................................................................................................... 14 2.4.2 Bike………………………………………………………………………………………………………………………………………………………...…..15 2.4.3 Commuter Rail ........................................................................................................................................................................................... 16 2.4.4 Transit……………………………………………………………………………………………………………………………………………………..….17 3 Analysis Methodology .......................................................................................................................... 20 3.1 Traffic Operational Analysis Methodology ......................................................................................................................... 20 3.2 Safety Analysis Methodology ............................................................................................................................................... 21 4 Traffic Operational Analysis ................................................................................................................ 21 4.1 Traffic Data Collection ........................................................................................................................................................... 21 4.2 Traffic Volumes ....................................................................................................................................................................... 22 4.2.1 Traffic Volumes ......................................................................................................................................................................................... 22 4.2.2 Manresa Island Trip Generation .......................................................................................................................................................... 23 4.2.3 Manresa Island Trip Distribution ......................................................................................................................................................... 25 4.2.4 Manresa Island Traffic Volumes .......................................................................................................................................................... 27 4.3 Traffic Modeling & Analysis ................................................................................................................................................. 28 i | P a g e The Walk Bridge Program Manresa Island Traffic Study Norwalk, CT October 2020 5 Safety Analysis ...................................................................................................................................... 33 5.1 Crash Summaries .................................................................................................................................................................... 33 5.2 Crash Trends & Patterns ....................................................................................................................................................... 36 5.3 Crash Rates .............................................................................................................................................................................. 38 6 Conclusions & Recommendations ...................................................................................................... 38 Tables Table 2.1: Norwalk Transit District Bus Schedules................................................................................................................................. 18 Table 3.1: Signalized Intersection Level of Service Criteria ............................................................................................................... 20 Table 3.2: TWSC & AWSC Intersection Level of Service Criteria ...................................................................................................... 21 Table 4.1: Traffic Data Sources ..................................................................................................................................................................... 22 Table 4.2: Average Growth Factor ................................................................................................................................................................ 23 Table 4.3: Manresa Island Daily Trip Generation .................................................................................................................................... 25 Table 4.4: Synchro Analysis Results – Martin Luther King Jr. Drive & Monroe Street.............................................................. 29 Table 4.5: Synchro Analysis Results – South Main Street & Monroe St/Hanford Place ........................................................... 30 Table 4.6: Synchro Analysis Results – South Main Street & Henry Street .................................................................................... 30 Table 4.7: Synchro Analysis Results – South Main Street & Woodward Ave/Concord Street ................................................ 31 Table 4.8: Synchro Analysis Results – Woodward Avenue & Grove Street (One-Way Stop Controlled) ............................ 31 Table 4.9: Synchro Analysis Results – Woodward Avenue & Route 136 (Burritt Avenue) ..................................................... 32 Table 4.10: Synchro Analysis Results – Woodward Avenue & Route 136 (Meadows Street) ................................................ 32 Table 4.11: Synchro Analysis Results – Overall Intersection Operations ...................................................................................... 33 Table 5.1: Crashes By Intersection - 3-Year Period ............................................................................................................................... 34 Table 5.2: Crashes By Collision Type & Severity .................................................................................................................................... 35 Table 5.3: Crashes By Road Surface & Light Condition ........................................................................................................................ 36 Table 5.4: Crash Rates ...................................................................................................................................................................................... 38 Figures Figure 1: Project Location