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Work Zone Detection

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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Work Zone Detection

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  1. Work Zone Detection Brian Kary and Terry Haukom- RTMC

  2. Why Do It • Provide Delay Information To Motorists • Potential for Diversion • Perception Tracking Survey Results

  3. 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

  4. 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.

  5. 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

  6. Traveler Information • Traveler Information Websites • Smart Phone Apps

  7. Traveler Information • Traffic Reports • Travel Times Signs

  8. Detection Trailer • Wavetronics Sensor • Camera • Wireless Modem • Solar Power

  9. Travel Time Zone Distance Between Stations = ½ mile Distance Between Stations = ½ mile Error Caused by Increased Spacing Between 55 MPH and 5 MPH

  10. 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

  11. Issues with Past Projects • Not enough lead time for integration • Lack of communications about traffic switches • Inadequate detection methods • Increased detection spacing • Probe data

  12. 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. 

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

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