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Implementation and Evaluation of the Enhanced Speed Compliance for Work Zones (ESC4WZ) System

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Implementation and Evaluation of the Enhanced Speed Compliance for Work Zones (ESC4WZ) System Implementation and Evaluation of the Enhanced Speed Compliance for Work Zones (ESC4WZ) System Final Report Prepared by: Daniel M. Nelson, AICP AECOM February 2017 Published by: Minnesota Department of Transportation Research Services & Library 395 John Ireland Boulevard, MS 330 St. Paul, Minnesota 55155-1899 This report represents the results of research conducted by the authors and does not necessarily represent the views or policies of the Minnesota Department of Transportation and/or (author’s organization). This report does not contain a standard or specified technique. The authors and the Minnesota Department of Transportation and AECOM do not endorse products or manufacturers. Trade or manufacturers’ names appear herein solely because they are considered essential to this report ACKNOWLEDGMENTS The authors of this report wish to acknowledge the very helpful efforts of several MnDOT and Department of Public Safety staff that provided their insight and resources to assist in the completion of this Innovative Idea project, including MnDOT Project Manager Rashmi Brewer, Minnesota State Patrol Major Bruce Brynell, Minnesota State Patrol Lt. Bob Zak, Minnesota State Trooper Scott Rudeen, Minnesota State Patrol Lt. Denise Lien, Minnesota State Patrol Lt. Colonel Rochelle Schrofer, and MnDOT OCIC Work Zone Safety Supervisor Ted Ulven. This report also acknowledges the valuable contributions from MnDOT Work Zone Safety Coordinator Craig Mittelstadt, who passed away in the summer of 2015. TABLE OF CONTENTS Chapter 1: Introduction ................................................................................................................... 1 1.1 Project Purpose ..................................................................................................................... 1 1.2 Project Background ............................................................................................................... 1 1.3 Operational Needs ................................................................................................................. 1 1.4 Project Description................................................................................................................ 3 Chapter 2: Systems Engineering for ITS Process ........................................................................... 4 2.1 MnDOT Statewide Regional ITS Architecture and ITS Development Objectives .............. 5 2.2 Systems Engineering Documents ......................................................................................... 6 Chapter 3: ESC4WZ System Equipment and Operational Testing ................................................ 8 3.1 ESC4WZ Field Equipment ................................................................................................... 8 3.2 Software Interface ................................................................................................................. 9 3.3 Planning and Deployment Project Stages ........................................................................... 12 3.3.1 Work Zone Coordination and Planning for System Installation .................................. 12 3.3.2 April - May: Work Zone Coordination and Planning for Installation ......................... 13 3.3.3 Work Zone Coordination and Planning for System Installation .................................. 15 3.3.4 MSP Testing Period 1: Week of July 25th .................................................................... 17 3.3.5 MSP Testing Period 2: Week of August 8th ................................................................. 18 3.3.6 MSP Testing Periods 3 and 4: Weeks of August 29th and Sept. 12th ........................... 19 3.3.7 System Operations October – November 2016 ........................................................... 20 Chapter 4: ESC4WZ System Evaluation ...................................................................................... 22 4.1 System Validation Process .................................................................................................. 22 4.2 System Validation Results .................................................................................................. 23 4.2.1 MOE #1 – Assessment of Enhanced Speed Compliance............................................. 23 4.2.2 MOE #2 – Enhance Safety of Speed Enforcement ...................................................... 26 4.2.3 MOE #3 – Enhance the Efficiency of Speed Detection ............................................... 27 4.2.4 MOE #4 – Provide Performance Metrics for Analysis ................................................ 27 4.3 System Validation Results .................................................................................................. 28 Chapter 5: Conclusions and Recommendations ........................................................................... 33 5.1 Conclusions ......................................................................................................................... 33 5.2 Lessons Learned and Considerations for Future Installation .............................................. 34 5.2.1 Integration of System Placement with Work Zone Traffic Management Plan ............ 34 5.2.2 System Component Modifications ............................................................................... 36 5.3 Recommendations for Future Installation and Cost Estimates ........................................... 37 5.3.1 Develop Procedures for System Incorporation into Work Zone Design ..................... 37 5.3.2 Perform System Modifications .................................................................................... 37 LIST OF FIGURES Figure 1.1 General Problems and Operational Needs. .................................................................... 2 Figure 1.2 ESC4WZ System Overview .......................................................................................... 3 Figure 2.1 Systems Engineering V-Diagram. ................................................................................. 4 Figure 3.1 ESC4WZ Field Equipment and Cabinet Components .................................................. 9 Figure 3.2 Software Interface (Main Screen) ............................................................................... 10 Figure 3.3 Software Interface (Violation Review Screen)............................................................ 11 Figure 3.4 Image of Software Interface in MSP Vehicle.............................................................. 12 Figure 3.5 Overview of ESC4WZ System Location in I-35E Work Zone ................................... 14 Figure 3.6 ESC4WZ System Location (View from County Road J Looking South) ................... 14 Figure 3.7 Sample Summary of Speed Limit Violations .............................................................. 16 Figure 3.8 Observation Form for MSP in Use of the ESC4WZ System ...................................... 17 Figure 4.1 Total Count of Vehicles Traveling Above Trigger Speed (75 MPH) during Speed Enforcement Time Periods with MSP Parked North of County Road J ....................................... 24 Figure 4.2 Total Count of Vehicles Traveling Above Trigger Speed (75 MPH) during Speed Enforcement Time Periods with MSP Parked South of County Road J ....................................... 25 Figure 4.3 Total Count of Vehicles Traveling Above Trigger Speed (75 MPH) during Speed Enforcement Time Periods with MSP Parked North of County Road J ....................................... 26 Figure 4.4 Total Count of Vehicles Traveling Above Trigger Speed Value (75 MPH) during Week of Aug. 1st ........................................................................................................................... 28 Figure 4.5 Results of 95% Statistical Significance Test on Vehicle Samples .............................. 32 Figure 5.1 Summary of Conclusions on ESC4WZ System .......................................................... 33 LIST OF TABLES Table 2.1 Rule 940 Requirements ................................................................................................... 5 Table 2.2 Minnesota ITS Development Objectives Related to ESC4WZ System ......................... 6 Table 2.3 Systems Engineering Documents ................................................................................... 7 Table 3.1 System Component Model Numbers and Detail ............................................................ 8 Table 3.2 System Installation and Operation Timeline ................................................................ 21 Table 4.1 Validation Plan Measures of Effectiveness .................................................................. 22 Table 4.2 Speed Validation for Enhanced Speed Compliance for Work Zone ............................ 29 Table 5.1 Cost Estimate to Re-Enable System for Future MnDOT Work Zone .......................... 38 Table 5.2 Cost Estimate to Re-Enable and Enhance System for Future MnDOT Work Zone..... 38 Table 5.3 Cost Estimate to Procure Additional System for Additional MnDOT Work Zone ...... 39 EXECUTIVE SUMMARY This project report details the design, development, deployment, testing and evaluation of the Enhanced Speed Compliance for Work Zones (ESC4WZ) System that was installed along side of an Interstate 35E work zone near White Bear Lake, MN. The purpose of this project was to deploy, test and evaluate a mobile system that could be used by Minnesota State Patrol (MSP) officers to safely conduct manual on-site speed enforcement in work zones.
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