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# Work Zone Detection - PowerPoint PPT Presentation

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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## PowerPoint Slideshow about ' Work Zone Detection' - aurora

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Presentation Transcript

### Work Zone Detection

Brian Kary and Terry Haukom- RTMC

• Provide Delay Information To Motorists

• Potential for Diversion

• Perception Tracking Survey Results

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

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.

• 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

• Wavetronics Sensor

• Camera

• Wireless Modem

• Solar Power

Distance Between

Stations = ½ mile

Distance Between

Stations = ½ mile

Error Caused by Increased Spacing

Between 55 MPH and 5 MPH

• 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

• Not enough lead time for integration

• Lack of communications about traffic switches

• Increased detection spacing

• Probe data

• 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.

Questions?Brian KaryFreeway Operations [email protected] HaukomRTMC Design and Maintenance [email protected]