Wireless Communications and ITS The Capital District Advanced Traveler Information Systems and Traff

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Wireless Communications and ITS The Capital
District Advanced Traveler Information Systems
and Traffic Incident Management Systems

• Professors G.F. List
• and W.A. Wallace
• Co-Principal Investigators
• Earl Rusty Lee and Alix Demers
• Project Managers
• Rensselaer Polytechnic Institute
• Center for Infrastructure and Transportation
  Studies

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What is the project?

• Evaluate various methods to collect, process and
  distribute real-time travel information
• Serve highway users, educational institutions,
  and major private developments in the existing
  Route 4 and TMC transportation corridors
• Duration March 2003 Jan 2005
• Testbed established as part of the I-90 connector
  to serve as research area

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The In-Vehicle System
Voice
GPS
Wireless Web
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Information Exchange

• Vehicle sends location and notification of
  passing monuments
• Processed into link speeds
• Returned to vehicle
• Re-route or not
• End of trip data

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The Testbed Area

• Congested Links
• Multiple Peaks (classes)
• Techy travelers
• Path Choices
• Freeways and signalized arterials
• Partially Instrumented
• Loops, video, signal detectors

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The Overall Network

• 400 nodes
• More than 800 links
• 28 Zones
• 16 Signalized intersections (mostly actuated
  signals)

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Who is involved?

• Academic partners
• Rensselaer, Cornell University, Polytechnic
  University and CUBRC (CALSPAN / University of
  Buffalo Research Center)
• Public Partners
• FHWA, NYSDOT, CDTC, Rensselaer County Economic
  and Community Development, Hudson Valley
  Community College, CDTA
• Corporate partners
• ALK Technologies, Inc., Annese and Associates,
  Consensus Systems Technologies, Sprint

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Surveys

• North Greenbush Households (187 of 997)
• HVCC Staff (237 of 1058)
• HVCC Students (1091 of 9575)
• Tech Park Employees (492 of 2500)
• Commercial Operators - Mabey Moving Garelick
  Farms UPS, CDTA, etc.

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Preliminary Results

• Consistent with national observations

• Want to Know
• Congestion
• Incidents / Construction
• Weather
• Alternative routes

• How they Get
• Commercial Radio
• Observations
• TV
• VMS
• HAR
• Cell Phone / Other drivers
• Internet

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What Are the Data Sources?

• Roadside Point visibility
• Intrusive or Non-intrusive
• Fixed location, anonymous, expensive
• Vehicle tags Link Visibility
• Better, but gaps in visibility of network
• Vehicle probes Network visibility
• Use existing infrastructure and off the shelf
  systems wide area visibility
• Two way system

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How Do You Get the Information Out?
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Design of the Experiments

• Vary of vehicles in system that are probe cars
• Compare probe car average to all vehicle average
• Select Participants to get high density coverage
  on links
• Based on
• O D matrix estimation
• Survey of potential participants
• Optimization of distributions of paths used

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Expected Information Quality from Probes

• Freeways
• Estimate within 5-10 of actual with 90-95
  confidence
• 2-3 probes each 5 min
• Probe density at least 1
• Arterials
• Travel time estimate within 10-15 of actual with
  85-90 confidence
• 7 probes cross link each 5 min
• Probe density 10

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Concerns / Lessons Learned

• User needs
• Pre and post project
• Technology Myths
• US Wireless
• GPS Cell Phones
• Emerging Technology
• Air Sage
• DSRC
• Zip Dash
• Privacy
• Less of an issue when information has greater
  value

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Whats Next

• Field Tests (4 months)
• Data Analysis
• Travel Time Estimation Methods
• Path Choice Analysis
• Study Use Practices
• Study Network Performance

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Follow-On Project

• Traffic Incident Management
• Started this summer
• CAD Integration
• TMC , 2 county dispatch centers, Thruway, City of
  Albany / Capitol police, CDTA
• Experimentation with Incident Management process
• Technologies and techniques from ATIS for
  detection and management