Work Zone Data in Ohio

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Work Zone Data in Ohio

• Dave Holstein, Administrator
• Office of Traffic Engineering

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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.

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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)

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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)

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Work Zone Data in Ohio - Historic

• Tells how we are doing with safety

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Work Zone Data in Ohio - Historic

• Tells how we are doing with safety

With
Crash Rate Accidents/Million Vehicle Miles
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Work Zone Data in Ohio - Historic
2006 Example of Work Zone vs. Pre-Work Zone Crash
Rates (Previous slide)
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Work Zone Data in Ohio - Historic

• Tells how we are doing with safety

Ohio
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(No Transcript)
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Work Zone Data in Ohio - Historic

• Tells how we are doing with safety

Problems?
Work Zone vs. (Non Work Zone) Fatal Crash
Statistics
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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)

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WZ Data in Ohio Near Real-Time
Finds Problems in the Field in Time to Make
Changes
Mile 16.2 16.99 Non WZ 7 Month Avg. WZ 3 Month
Total BIG PROBLEM !!
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WZ Data in Ohio Near Real-Time
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WZ Data in Ohio Near Real-Time
2008 Work Zones Monitored for Crashes
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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)

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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

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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 _at_ 110/month
• Just data no equipment no electric no
  communications

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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

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WZ Data in Ohio Real-Time
The Work Zone
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Work Zone Data in Ohio

• Questions?
• Thank You
• Dave Holstein
• State Traffic Engineer, Ohio DOT
• 614-644-8137
• Dave.holstein_at_dot.state.oh.us