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Rural Application of the Colorado Transportation Management System

Rural Application of the Colorado Transportation Management System. Presented at ITS America, June 2007, Palm Springs, CA By Raj Chaudhuri and Ken DePinto. Background. Colorado Traffic Operations Center Duties 24/7 Operation Provide Statewide Traveler Information

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Rural Application of the Colorado Transportation Management System

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  1. Rural Application of the Colorado Transportation Management System Presented at ITS America, June 2007, Palm Springs, CA By Raj Chaudhuri and Ken DePinto

  2. Background • Colorado Traffic Operations Center Duties • 24/7 Operation • Provide Statewide Traveler Information • Maintain and Operate VMS’s/DMS’s, CCTV’s, Fiber Backbone, 511, etc. • Partnerships With Media, Cities, OEM, Counties, Other

  3. I-70 Corridor Characteristics • Trip Travel Time (Approximately 100 miles –Denver International Airport to Vail) • Recreational Traffic • Typical Peak Traffic (Friday, Saturday and Sunday) • Drive Time 3-4 hours on weekends • Posted Speed Limit 65 MPH (Interstate 70) • Alternate Routes - 100 plus mile detours • Incidents Are Common

  4. Denver to Vail • Infrastructure • 15 Dynamic Message Signs (2 portable) • 11 Remote Traffic Microwave Sensors • 12 Automatic Vehicle Identifiers • Communications (Fiber and Cell)

  5. Detection Devices Ramp Meters 89 Automatic Traffic Recorders 110 AVIs (400,000 Tags in Denver Metro) 18 Microwaves 121

  6. Purpose • Alleviates Driver Frustration • Provides Drivers Information Prior to Making Travel Plans • Sent to Communities via Internet, Web and Cable TV (COTRIP.ORG) • Spreads Out The Peak Periods • Prevents Secondary Incidents • One GUI for all devices

  7. Future Deployment • Ground mount signs • Currently Studying Drivers Perception of Travel Time • Plans For Additional Corridors

  8. Get Data • AVI Toll Tag Readers • Read and transmit • Encrypt and match • AVI Source/destination pairs • True vehicle ground speed • Loops / Side fire Radars • Read and record point data • Every 1 minute collect VOS data • Collect Data from over 300 devices

  9. Process Data • Algorithm developed by Dion and Rakha at Virginia Tech Transportation Institute • Adaptive filtering technique • Dynamic adjusting valid window using standard deviations • Applies log normal distribution • Works with low sample rates on freeways and arterials • Adjusts rapidly by dropping its floor or ceiling • Weighted % result ( AVI 70pctw + RTMS 20pctw + Rampmeters10pctw ) • Calculates Speed, Volume Occupancy and Travel time every 2 minutes

  10. View Data • GIS based map client • Speeds • Devices by status

  11. View Data • View Segment

  12. View Data • View Route

  13. Generate Alarms • Segment has speed less than 15 mph for 8 minutes, and / or • Segment has occupancy of over 50% for 8 minutes • Share data with cities (Denver, Lakewood)

  14. Activate Dual Messages • Select signs (grouped by configuration) • Type message about incident • Include Speed / Trip Travel Time messages • WYSIWYG editor, spell checker, message library

  15. View VMS Detail • Device Status • WYSIWYG Message • Errors

  16. CTMS Statistics • 365 Devices in CTMS • 0.5 GB of data collected per day • Entire database size is 102.5 GB, containing data from 2/1/2006 • All data is being archived and kept forever • 136 Variable Message Signs • Estimate travel times updated to 15 signs every 3 minutes • 121 RTMS & Wavetronics • Speed, volume and occupancy data for each lane collected every 30 seconds • 89 Ramp Meters • "Type 1 Data" average smoothed speed, occupancy, and volume data for each ramp meter collected every 20 seconds • "Type 2 Data" average speed, occupancy, and volume data for each ramp meter and lane collected every 1 minute • 19 AVI Toll Tag Readers • Speed and travel time from source AVI to destination AVI calculated for each vehicle immediately after it passes the destination AVI and stored in the database

  17. Events • Scheduled Construction Maintenance • Courtesy Patrol • Closures/Incidents

  18. Contact Information Ken DePintoken.depinto@dot.state.co.us Raj Chaudhurirajat.chaudhuri@dot.state.co.usraj.chaudhuri@enroutetraffic.com

  19. Appendix • The information in the appendix contains details about the CTMS application including: screen shots, high level technical information, cdot toc facility and references

  20. Toll Tag Readers Dynamic Message Signs Ramp Meters RTMS Innovation: Integrate Any Device…

  21. Innovation: Across Any Network Topology Fiber Modem IP

  22. Technical Architecture

  23. Software Architecture

  24. Software Architecture - Implemented in 90% Open Source! • Integrated Development Environment • Eclipse IDE • J2EE Application Server • JBoss Application Server • Messaging Server • JBoss MQ • Communications • GNU’s RTXTComm APIs • OpenNMS’s JoeSNMP • Scheduling • Quartz • Utilities • Apache Ant, Commons, JMeter, Logging, Velocity • Operating System • RedHat Linux Enterprise

  25. Map Navigator

  26. Status Console

  27. View Segment Detail

  28. View Route Detail

  29. View AVI Detail Screen

  30. View RTMS / Ramp Meter Screens

  31. Camera Tours • Video content • Route data

  32. CDOT TOC

  33. References • Dion, Francois, and Rakha, Hesham “Estimating Dynamic Roadway Travel Times using Automatic Vehicle Identification Data for Low Sampling Rates”http://www.gmupolicy.net/its/AVI%20Filter%20Paper%20-%20_TRB%202003%20Submittal_%20-%20Revised.pdf • CDOT Reading Roomhttp://www.cotrip.org/its/ctms_doc/ • Enroute Traffic Inc.http://www.enroutetraffic.com

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