Work Zone Mobility and Safety Program
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Work Zone Data in Ohio (Presentation)

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Contact Information: WorkZoneFeedback@dot.gov

Slide 1. Work Zone Data in Ohio

Dave Holstein, Administrator
Office of Traffic Engineering

Slide 2. Work Zone Data in Ohio

  • Why do we worry about work zone data:
    • We can use it to learn from and improve; and
    • 23 CFR 630 Subpart J requires it: "Shall continually pursue improvement of wz safety and mobility by analyzing work zone crash and operational data from multiple projects…."

Slide 3. Work Zone Data in Ohio

  • 3 Categories of WZ data in Ohio:
    • Historic Data (primarily crash)
    • Near Real-time (also crash)
    • Real-time (mobility/speed)

Slide 4. Work Zone Data in Ohio

  • 3 Categories of WZ data in Ohio:
    • Historic Data (primarily crash)
    • Near Real-time (also crash)
    • Real-time (mobility/speed)

Slide 5. Work Zone Data in Ohio – Historic

  • Tells how we are doing with safety…

Bar graph of construction cost awarded by ODOT vs. work zone total crashes, showing $1 billion awarded ($150 million for LPA projects) in 2001 with 8039 work zone crashes, $1.1 billion ($160 million for LPA) in 2002 with 6808 wz crashes, $900 million ($200 for LPA) in 2003 with 7409 wz crashes, $1.1 billion ($220 million for LPA) in 2004 with 6389 wz crashes, $1.2 billion ($200 million for LPA) in 2005 with 5854 wz crashes, and in $1.3 billion ($160 million for LPA) in 2006 with 5772 wz crashes

Slide 6. Work Zone Data in Ohio – Historic

  • Tells how we are doing with safety…

Table of crash rates as accidents per million vehicle miles, showing 2002 rate before work zone as 1.04, with work zone as 1.68 (62% increase); 2003 rate before wz as 1.19, with wz as 2.02 (69% increase); 2004 rate before wz as 1.34, with wz as 1.71 (28% increase); 2005 rate before wz as 1.29, with wz as 1.23 (5% decrease); 2006 rate before and with wz as 1.51 (0% increase)

Slide 7. Work Zone Data in Ohio – Historic

2006 Example of Work Zone vs. Pre-Work Zone Crash Rates (Previous slide)

Comparison table of pre-work zone crashes and work zone crashes for 2006, showing work zone information, work zone crash summaries, pre-work zone crash summaries, and differences in percentage of crashes; also shows average crash costs, cost increase, expected costs, and savings

Slide 8. Work Zone Data in Ohio – Historic

  • Tells how we are doing with safety…

Table of comparison of state work zone fatalities per $1 billion of construction as reported by 2004 FARS, showing fatalities ranging from 31 to 0, highlighting Ohio FARS data as 10 and actual data as 6

Slide 9. Work Zone Data in Ohio – Historic

  • Tells how we are doing with safety…

Table of work zone fatal crashes for 2001 to 2005, showing totals with factors such as pedestrians, construction workers, speeding, DUI, seatbelt used, interstate, US/SR, other routes, motorcycle, stopped traffic, incorrect lane, wet pavement, and night, highlighting new emphasis areas as 20% increase for pedestrian crashes, 25% for construction workers, 35% for speeding, and 35% for night

Slide 10. Work Zone Data in Ohio – Historic

  • Tells how we are doing with safety…

Table of eight work zone vs. non work zone fatal crash statistics for 2001 to 2005 with averages, highlighting problems as rear end crashes (average of 33% wz and 12% non-wz), speeding (average of 43% wz and 36% non-wz), and motorcycles (average of 12% wz and 7% non-wz)

Slide 11. Work Zone Data in Ohio

  • 3 Categories of WZ data in Ohio:
    • Historic Data (primarily crash)
    • Near Real-time (also crash)
    • Real-time (mobility/speed)

Slide 12. WZ Data in Ohio – Near Real-Time

Finds Problems in the Field in Time to Make Changes

Three bar graphs of FRA-SR-161 work zone crashes for pre work zone 3-year averages by section, month, and average, highlighting mile 16.2 to 16.99 as a non work zone 7 month average of 31 crashes with a work zone 3-month total of 48 crashes—a big problem

 

Slide 13. WZ Data in Ohio – Near Real-Time

Two pie charts and two bar graphs of work zone crash analysis of FRA-SR-161 work zone crashes, showing severity, contributing factor, road condition, and type of crash

Four pie charts and two bar graphs of FRA-SR-161 work zone crashes, showing light condition, day of the week, direction, work zone location, and crash location

Slide 14. WZ Data in Ohio – Near Real-Time

2008 Work Zones Monitored for Crashes

Table of 13 2008 work zone crash report locations, showing locations, district, dates, PID, log dates, mileposts, ADT, interchanges, ramp information, and jurisdictions

Slide 15. Work Zone Data in Ohio

  • 3 Categories of WZ data in Ohio:
    • Historic Data (primarily crash)
    • Near Real-time (also crash)
    • Real-time (mobility/speed)

Slide 16. WZ Data in Ohio – Real-Time

  • New effort in Ohio
  • LEASING speed & travel time information
  • Contract advertised and awarded (low bid) separately from the construction project
  • First Deployment is in Dayton Ohio to support I-75 reconstruction project

Slide 17. WZ Data in Ohio – Real-Time

  • Dayton construction project has potential to effect entire region so speed/travel time information is being gathered for alternate routes as well as the zone itself.
  • Total Cost = $132,000/year (entire Dayton metro area)
  • 100 Sensor Locations @ $110/month
  • Just data; no equipment; no electric; no communications

Slide 18. WZ Data in Ohio – Real-Time

  • Small scale example:
    • 8 mile work zone
    • Sensor spacing ½ mile in transition area and 1 mile in work area
    • Approximately 10 sensors covers both directions (depending on median width and mounting locations – worst case 20 for both directions)
    • Cost = $1,100/mo (10 sensors)
    • Gives real time data via cellular broadband that can be used internally or externally via the web

Slide 19. WZ Data in Ohio – Real-Time

Highway map of Dayton area showing speeds on I-70, I-75, I-675, US 35, and Route 4, highlighting work zone in Dayton

Slide 20. Work Zone Data in Ohio

Questions?

Thank You

Dave Holstein
State Traffic Engineer, Ohio DOT
614-644-8137
Dave.holstein@dot.state.oh.us

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