Work Zone Performance Measures Pilot Test
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Contact Information: workzonepubs@dot.gov
![transportation management center](images/document/cover1.jpg)
![work zone within a busy freeway](images/document/cover2.jpg)
![bar graph: 71.2% of allowable nights worked; 51.1% of all nights worked](images/document/cover3.jpg)
April 2011
![U.S. Department of Transportation - Federal Highway Administration](images/document/fhwa_logo.jpg)
Office of Operations
1200 New Jersey Avenue, SE
Washington, DC 20590
http://www.fhwa.dot.gov/workzones
FHWA-HOP-11-022
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.
Table of Contents
- NOTICE
- LIST OF TABLES
- LIST OF FIGURES
- TECHNICAL REPORT DOCUMENTATION PAGE
- ACKNOWLEDGEMENTS
- EXECUTIVE SUMMARY
- 1. INTRODUCTION
- 2. BACKGROUND AND DESCRIPTION OF THE WORK ZONE PERFORMANCE MEASURE PILOT TEST
- 3. IDENTIFYING THE WORK ZONE PERFORMANCE MEASURES OF INTEREST
- 4. DATA COLLECTION METHODS
- 5. PERFORMANCE MEASURE COMPUTATIONAL PROCEDURES
- 6. PILOT TEST LOCATION #1: I-95, LUMBERTON, NC
- 7. PILOT TEST LOCATION #2: I-405, SEATTLE, WASHINGTON
- 8. PILOT TEST #3: I-95, PHILADELPHIA, PA
- 9. PILOT TESTS #4 AND #5: I-15, LAS VEGAS, NV
- 10. FINDINGS AND LESSONS LEARNED
- 11. REFERENCES
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
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.