Intelligent Transportation Trends chpt.3 - Traffic Monitoring

1,204 views

Published on

The term Intelligent Transportation Systems (ITS) was coined over two decades ago to designate applications of information and communication technologies to the operational management of transportation networks. The main promise of ITS has been very consistent over that period: network capacity can be freed up by optimizing traffic controls and empowering users with accurate travel information.
It can be debated how much faith practitioners and policy makers have placed in technology by investing their resources, as well as the extent to which Intelligent Transportation Systems have delivered on their promise. However, there is no question that steady and sometimes spectacular advances in computing technologies and usage trickle down to transportation applications in important ways. As a result, new products and services emerge continuously. They include systems that address the direct needs of networks managers, as well as others that are developed in tangential markets (e.g. automotive) or even through non-market mechanisms (e.g. many mobile web applications).
This talk presentation reviews major trends in information and communication technologies and demonstrate how each of them is driving innovative transportation services. We attempt to envision how those trends might develop in the future, so that we can finally examine some of their implications for travel demand and network management. There lie both challenges and opportunities for transportation engineers and planners, but either way, profound changes appear inevitable.

Published in: Technology
0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
1,204
On SlideShare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
118
Comments
0
Likes
1
Embeds 0
No embeds

No notes for slide

Intelligent Transportation Trends chpt.3 - Traffic Monitoring

  1. 1. Intelligent Transportation J.D. Margulici Trends and Perspectives jdm@novavia.us 2011 www.novaviasolutions.com Chapter 3: Traffic MonitoringNote to copyright owners: all third-party materials contained in this presentation were obtained frompublicly available sources. However, they are reproduced here without explicit permission from their owners. Novavia Solutions will gladly remove any such material at the owner’s request.
  2. 2.  ITS primer and brief historyIntelligent Transportation  State of the art: traffic monitoring Trends and Perspectives 2011  Information technology trends  Prospective and implications J.D. Margulici jdm@novavia.us www.novaviasolutions.com
  3. 3. You cannot manage what you cannot measure… Traffic sensors are the technological backbone enabling system management ITS Trends and Perspectives - April 2011 3
  4. 4. Traffic Sensors: State of the Art ITS Trends and Perspectives - April 2011 4
  5. 5. Sensor Data Point Detection Segment Detection Floating Data • Fixed locations • Fixed segments • Possibly random • Samples volume, • Samples travel locations occupancy, speed times • Samples speed n(x,t) T(i,[x1,x2]) v(x,t) k(x,t) v(x,t) Completeness True Trips Coverage ITS Trends and Perspectives - April 2011 5
  6. 6. Traffic Sensors: Point DetectionInductive Loop (ILD)Doppler RadarVideoDoppler MicrowavePassive Acoustic ITS Trends and Perspectives - April 2011 6
  7. 7. Segment ReadingToll Tag ReadersLicense Plate ReadersMagnetic SignatureBluetooth / MAC ID ITS Trends and Perspectives - April 2011 7
  8. 8. Travel Time from Portable ALPR Average Hourly Volume at CA154NBCA-154 US-101 Tube Count LPR Camera Count Matched Plate CountTwo-lane local highway 4-lane national divided highway 900Length: 31 miles Length: 47 milesWinding 800Slow speeds 700 Volume (Vehicles) 600 500 400 300 200 100 0 0:00 3:00 6:00 9:00 12:00 15:00 18:00 21:00 Time of day ITS Trends and Perspectives - April 2011 8
  9. 9. Floating Car Data ITS Trends and Perspectives - April 2011 9
  10. 10. Mobile Century: GPS-Equipped Phones as Traffic Probes… ITS Trends and Perspectives - April 2011 10
  11. 11. Mobile Century: Design of Experiment 165 Berkeley students drivers 100 GPS-enabled cell phones (N95) 100 rented cars 6 to 10 mile loops, I-880 10am to 7pm 2-5% penetration rate 1/3Hz data stored on phones Real-time, online flow reconstruction (VTLs) ITS Trends and Perspectives - April 2011 11
  12. 12. Mobile Century 2.8.812 ITS Trends and Perspectives - April 2011 12
  13. 13. Virtual Trip Lines vs. Local Log vs. Speedometer ITS Trends and Perspectives - April 2011 13
  14. 14. Penetration RatesA.M.P.M. ITS Trends and Perspectives - April 2011 14
  15. 15. Collected Trajectories (20% subset) ITS Trends and Perspectives - April 2011 15
  16. 16. Shockwave ITS Trends and Perspectives - April 2011 16
  17. 17. Contour PlotsLoop Detectors Phone Logs ITS Trends and Perspectives - April 2011 17
  18. 18. Speed ScaleContour Plots (2) 17 Loops Phone Logs 17 VTLs 30 VTLs ITS Trends and Perspectives - April 2011 18
  19. 19. Video Validation ITS Trends and Perspectives - April 2011 19
  20. 20. Travel Times ITS Trends and Perspectives - April 2011 20
  21. 21. Speed Dating: Loops + VTL… ITS Trends and Perspectives - April 2011 21
  22. 22. Traveler Information ITS Trends and Perspectives - April 2011 22
  23. 23. 511 2003 December 10, 2010 ITS Trends and Perspectives - April 2011 23
  24. 24. Traffic Information: Value Chain Surface StreetsRoadway Probe Filter & GIS Phone / PDA Navigation Radio Web Mobile Car Sensors Data Interpret Integration Apps. Units Broadcasting Publishing Networks Makers Data Data Application Delivery Branding & Collection Processing Packaging Channels DistributionIncident Weather & Trip Logistics & Mobile Information Mass Aggregate Predict TV Reports Data Events Planning Professional Delivery Portals Media Freeways ITS Trends and Perspectives - April 2011 24
  25. 25. Real-time Traffic Detection: Supply and DemandInfrastructure-Side Technology Vehicle-Side Technology 3,900 Actual U.S. Freeway Miles Covered with Real-time Detection Worldwide Navigation Units Sales (10,000s) Source: ITS Joint Projects Office Source: SiRF Technology ITS Trends and Perspectives - April 2011 25
  26. 26. Procurement of Private Data Federal Intelligent Transportation Infrastructure Program Current Challenges$2 million appropriated for data services in up to 25 Procurementmetro areas • Data quality audits, QATraffic.com deploys, operates and maintains sensor • Licensing rightsnetworkTraffic.com provides data to TV, radio, satellite radio,in-vehicle systems, and maintains public Web site Systems Integration • Traffic systems operate with volume/occupancyAgencies get unlimited real-time and archived datafor internal use • GIS integration with different segment definitions Data Policies • What fusion / selection procedures? • Where are detectors still needed? ITS Trends and Perspectives - April 2011 26
  27. 27. Traffic Information QualityTraffic information has become abundant but quality remains seldom monitored• End users are relatively clueless about information quality• Margins of error are not well understood and used in practiceThere are no widespread metrics or evaluation procedures to measure data quality• Each customer (e.g. car manufacturer, DOT…) conducts its own benchmark• Evaluation results cannot be readily comparedPostulate:Harmonized benchmarking methods would benefit both suppliers and customers• Improve consistency and fairness of evaluations• Lower overall costs by eliminating duplication of efforts• Better recognize true value-added and pull quality upward ITS Trends and Perspectives - April 2011 27
  28. 28. About NATWG The North American Traffic Working Group (NATWG) works collaboratively to define, accept and advocate for the unique needs of North America traffic information services. NATWG seeks to develop a coordinated, proactive market driven implementation of traffic and travel information services and products by both influencing international standards efforts and coordinating the development of non-competitive commercial agreements.Members sampling: ITS Trends and Perspectives - April 2011 28
  29. 29. Key Takeaway If counting cars keeps you awake at night, start counting sheep instead… ITS Trends and Perspectives - April 2011 29
  30. 30. Intelligent Transportation J.D. Margulici Trends and Perspectives jdm@novavia.us 2011 www.novaviasolutions.com Next is Chapter 4: Vehicle Technology

×