Work Zone Performance Measures Pilot Test

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Contact Information: WorkZoneFeedback@dot.gov

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April 2011

Office of Operations
1200 New Jersey Avenue, SE
Washington, DC 20590

https://www.fhwa.dot.gov/workzones

FHWA-HOP-11-022

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Notice

The Federal Highway Administration provides high quality information to serve Government, industry, and the public in a manner that promotes public understanding. Standards and policies are used to ensure and maximize the quality, objectivity, utility, and integrity of its information. FHWA periodically reviews quality issues and adjusts its programs and processes to ensure continuous quality improvement.

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Table of Contents

• NOTICE
• LIST OF TABLES
• LIST OF FIGURES
• TECHNICAL REPORT DOCUMENTATION PAGE
• ACKNOWLEDGEMENTS
• EXECUTIVE SUMMARY
• 1. INTRODUCTION
  • WHY MONITOR WORK ZONE PERFORMANCE?
  • WHY CONDUCT A WORK ZONE PERFORMANCE MEASURE PILOT TEST?
• 2. BACKGROUND AND DESCRIPTION OF THE WORK ZONE PERFORMANCE MEASURE PILOT TEST
  • BACKGROUND
  • DESCRIPTION OF THE WORK ZONE PERFORMANCE MEASURE PILOT TEST
• 3. IDENTIFYING THE WORK ZONE PERFORMANCE MEASURES OF INTEREST
  • EXPOSURE MEASURES OF INTEREST
  • QUEUE MEASURES OF INTEREST
  • DELAY MEASURES OF INTEREST
  • TRAVEL TIME RELIABILITY MEASURES OF INTEREST
  • SAFETY MEASURES OF INTEREST
• 4. DATA COLLECTION METHODS
  • ELECTRONIC TRAFFIC MONITORING
    • Conditions at a Particular Point on the Roadway
    • Travel Time Data along a Roadway Segment
  • MANUAL WORK ZONE MOBILITY MONITORING
  • SAFETY MONITORING DATA
• 5. PERFORMANCE MEASURE COMPUTATIONAL PROCEDURES
  • POINT MEASUREMENT ELECTRONIC TRAFFIC SURVEILLANCE DATA COMPUTATIONS
  • TRAVEL-TIME BASED ELECTRONIC SURVEILLANCE DATA COMPUTATIONS
  • MANUAL QUEUE LENGTH DATA COMPUTATIONS
• 6. PILOT TEST LOCATION #1: I-95, LUMBERTON, NC
  • DESCRIPTION
  • DATA SOURCES
  • RESULTS
    • Exposure Measures
    • Queuing Measures
    • Delay Measures
  • KEY FINDINGS FROM I-95 LUMBERTON PILOT TEST
• 7. PILOT TEST LOCATION #2: I-405, SEATTLE, WASHINGTON
  • DESCRIPTION
  • DATA SOURCES
  • RESULTS
    • Exposure Measures
    • Queuing Measures
    • Delay Measures
  • KEY FINDINGS FROM I-405 SEATTLE PILOT TEST
• 8. PILOT TEST #3: I-95, PHILADELPHIA, PA
  • DESCRIPTION
  • DATA SOURCES
  • RESULTS
    • Exposure Measures
    • Queuing Measures
    • Delay Measures
  • KEY FINDINGS FROM I-95 PHILADELPHIAPILOT TEST
• 9. PILOT TESTS #4 AND #5: I-15, LAS VEGAS, NV
  • DESCRIPTION
  • DATA SOURCES AND ANALYSES
  • RESULTS
    • Exposure Measures
    • Queuing Measures
    • Delay Measures
    • Travel Time Reliability Measure
  • KEY FINDINGS FROM THE I-15 PILOT TESTS
• 10. FINDINGS AND LESSONS LEARNED
  • DATA COLLECTION AND ANALYSIS FINDINGS AND LESSONS LEARNED
    • Manual Documentation of Queues by Field Personnel
    • Use of Electronic Traffic Surveillance Data
    • Truck Probe Spot Speed Data
    • Comparison across Possible Data Collection Methods
  • FINDINGS AND LESSONS LEARNED REGARDING PERFORMANCE MEASURE COMPUTATION AND INTERPRETATION
    • Exposure Measures
    • Queue Measures
    • Delay Measures
    • Travel Time Reliability Measure
    • Safety Measures
  • NEXT STEPS
• 11. REFERENCES

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LIST OF TABLES

• Table 1. Exposure Measures of Interest
• Table 2. Queuing Measures of Interest
• Table 3. Delay Measures of Interest
• Table 4. Safety Measures of Interest
• Table 5. Overview of Data Collection Methods for Work Zone Mobility Data
• Table 6. Data Collection Form for Manual Documentation of Queue Lengths and Duration
• Table 7. Queue Length Computations Based on Point Measurement Data
• Table 8. Truck Transponder Sample Size, I-95, Lumberton
• Table 9. Hours of Work Activity, I-95 Lumberton
• Table 10. Roadway Capacity Loss Measures, I-95 Lumberton
• Table 11. Vehicle Exposure Measures, I-95 Lumberton
• Table 12. Comparison of Queue Measures, I-95 Lumberton
• Table 13. Comparison of Queue Conditions During Travel Time Studies, I-95 Lumberton
• Table 14. Comparison of Delay Measures, I-95 Lumberton
• Table 15. Comparison of Speed and Delay During Travel Time Studies, I-95 Lumberton
• Table 16. Spot Sensor Location Northbound, I-405 Seattle
• Table 17. Spot Sensor Location Southbound I-405 Seattle
• Table 18. Truck Transponder Sample Size, I-405, Seattle
• Table 19. Hours of Work Activity, I-405 Seattle
• Table 20. Roadway Capacity Loss Measures, I-405 Seattle
• Table 21. Vehicle Exposure Measures, I-405 Seattle
• Table 22. Comparison of Queue Measures, I-405 Seattle
• Table 23. Comparison of Queue Conditions During Travel Time Studies, I-405 Seattle
• Table 24. Comparison of Delay Measures, I-405 Seattle
• Table 25. Comparison of Delays During Travel Time Studies, I-405 Seattle
• Table 26. Spot Sensor Locations Northbound, I-95 Philadelphia
• Table 27. Spot Sensor Locations Southbound, I-95 Philadelphia
• Table 28. Truck Transponder Sample Size, I-95, Philadelphia
• Table 29. Hours of Work Activity, I-95 Philadelphia
• Table 30. Roadway Capacity Loss Measures, I-95 Philadelphia
• Table 31. Vehicle Exposure Measures, I-95 Philadelphia
• Table 32. Comparison of Queue Measures, I-95 Philadelphia
• Table 33. Comparison of Queue Conditions During Travel Time Studies, I-95 Philadelphia
• Table 34. Truck Transponder Queue Indicators, I-95, Philadelphia
• Table 35. Comparison of Delay Measures, I-95 Philadelphia
• Table 36. Comparison of Delay Conditions During Travel Time Studies, I-95 Philadelphia
• Table 37. Location and Dates of Long-Term Lane Closures in South Project Limits
• Table 38. Truck Transponder Speed Sample Size, I-15, Las Vegas
• Table 39. Roadway Capacity Loss Measures, I-15, Las Vegas
• Table 40. Vehicle Exposure Measures, I-15, Las Vegas
• Table 41. Summary of Queue Measures, I-15 Las Vegas
• Table 42. Comparison of Queue Threshold Measures, I-15 Las Vegas
• Table 43. Comparison of Delay Measures, I-15 Las Vegas
• Table 44. Travel Time Data Comparison, I-15, Las Vegas
• Table 45. 95th Percentile Buffer Indices, I-15, Las Vegas
• Table 46. 80th Percentile Buffer Indices, I-15, Las Vegas
• Table 47. Comparison of Data Collection Methods for Work Zone Monitoring and Performance Measurement

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LIST OF FIGURES

• Figure 1. Traffic Mobility Performance Measure Used by Missouri DOT (7).
• Figure 2. Ohio DOT Work Zone Safety Performance Measures (recreated from 9).
• Figure 3. Illustration of a Portable Traffic Sensor Data Collection Device.
• Figure 4. Illustration of Traffic Surveillance Estimates using Spot Sensor Data.
• Figure 5. Example of Sensor Speed Analysis to Determine Duration and Length of Queue.
• Figure 6. Components of Work Zone Delay.
• Figure 7. Portable Traffic Data Collection Device at Pilot Test Location.
• Figure 8. Work Exposure Measures, I-95 Lumberton.
• Figure 9. Comparison of Queue Length Measures, I-95 Lumberton.
• Figure 10. Work Exposure Measures, I-405 Seattle.
• Figure 11. Comparison of Queue Length Measures, I-405 Seattle.
• Figure 12. Work Exposure Measures, I-95 Philadelphia.
• Figure 13. Comparison of Queue Length Measures, I-95 Philadelphia.
• Figure 14. I-15 Express Lanes Widening (South) Project.
• Figure 15. I-15 Interchange and Freeway Widening (North) Project.
• Figure 16. Percentage of Calendar Nights Involving Temporary Lane Closures at the South Project, I-15 Las Vegas.
• Figure 17. Changes in Average Speeds Northbound Before and During Evaluation Period, I-15 Las Vegas.
• Figure 18. Changes in Average Speeds Southbound Before and During Evaluation Period, I-15 Las Vegas.
• Figure 19. Effects of the Pilot Test Projects on Hours of Congestion, I-15 Las Vegas.
• Figure 20. Effect of the Pilot Test Projects on Average Queue Length, I-15 Las Vegas.
• Figure 21. Effects of Pilot Test Projects on Maximum Queue Lengths, I-15 Las Vegas.
• Figure 22. Percent of Daily Traffic That Encounters Queuing, I-15 Las Vegas.

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