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Work Zone Detection. Brian Kary and Terry Haukom - RTMC. Why Do It. Provide Delay Information To Motorists Potential for Diversion Perception Tracking Survey Results. Travel Time Messages – Ratings & Comments.

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Presentation Transcript
work zone detection

Work Zone Detection

Brian Kary and Terry Haukom- RTMC

why do it
Why Do It
  • Provide Delay Information To Motorists
  • Potential for Diversion
  • Perception Tracking Survey Results
travel time messages ratings comments
Travel Time Messages – Ratings & Comments

Q71d. How would you rate the idea of posting travel TIME information on overhead electronic signs as a tool to manage traffic?

All Drivers

  • Overall, drivers continue to consider displaying travel time information on overhead electronic signs to be a good idea.
    • There is a significant increase in the proportion of drivers who consider displaying travel time messages an “Excellent” idea.

N = Base # = Frequency

Data noted with arrow is significantly lower or higher respectively than 2011 at the 95% confidence level.

*Totals may not equal 100% due to rounding.

Mean = 8.19

Mean = 8.12

travel time messages actionability
Travel Time Messages - Actionability

Q71b. How often, if at all, do you take an ALTERNATE ROUTE because a travel time message on an overhead electronic message sign showed a longer time than your usual time for the trip?

  • Among those drivers who make a route decision based on a travel time message, nearly 6 in 10 chose to take an alternate route at least some of the time.

Have Made an Alternate Route Decision Based on Time Message Info

58%

N = Base # = Frequency

*Totals may not equal 100% due to rounding.

Data noted with arrow is significantly lower or higher respectively than 2011 at the 95% confidence level.

why integrate with rtmc
Why Integrate with RTMC?
  • Proven Method of Calculating Travel Times
  • Reduced Costs
    • Utilize existing 150+ DMS
    • Utilize detection outside of work zone
      • Currently have 400 miles of freeway instrumented with loop detection
      • Future detection will utilize more Wavetronics sensors which may allow detection within work zones
  • Traveler Information
slide6

Traveler Information

  • Traveler Information Websites
  • Smart Phone Apps
slide7

Traveler Information

  • Traffic Reports
  • Travel Times Signs
detection trailer
Detection Trailer
  • Wavetronics Sensor
  • Camera
  • Wireless Modem
  • Solar Power
travel time zone
Travel Time Zone

Distance Between

Stations = ½ mile

Distance Between

Stations = ½ mile

Error Caused by Increased Spacing

Between 55 MPH and 5 MPH

past projects
Past Projects
  • Included in Main Project – Lump Sum
    • I-35E – From CR 96 to I-35
      • $250,000
    • I-694 – From Hwy 61 to Hwy 5
      • $185,000
  • Separate Project
    • I-494 – From Hwy 100 to 34th Ave (SP 2785-392)
      • $262,300
issues with past projects
Issues with Past Projects
  • Not enough lead time for integration
  • Lack of communications about traffic switches
  • Inadequate detection methods
    • Increased detection spacing
    • Probe data
metro wide project sp 8825 465
Metro Wide Project - SP 8825-465
  • Total Project Estimated Cost - $750,000
  • Provide one prototype trailer.
  • SP 0285-65 on I-694 from Hwy 252 to I-35W. 
    • Provide 16 trailers.
  • SP 1982-161 on I-35E from I-35 south split to Cliff Rd. 
    • Provide 8 trailers.  
  • SP 2776-103 Hwy 169 River Bridge. 
    • Provide 18 trailers plus 3 PCMS.
  • SP 7080-51, 7080-50 on I-35 from District Border to I-35 south split. 
    • Provide 30 trailers which includes 3 w/ cameras plus 3 PCMS. 
slide14

Questions?Brian KaryFreeway Operations Engineerbrian.kary@state.mn.usTerry HaukomRTMC Design and Maintenance Supervisorterry.haukom@state.mn.us

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