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Development of New Data Collection Techniques

NYSDOT Traffic Monitoring Section Todd B. Westhuis, P.E. Development of New Data Collection Techniques. ITE/MPO 2004 Technical Conference. Data Collection Technologies. Sensors/Hardware Mobile Traffic Monitoring Platform Permanent Acoustic Site Micro Loops High speed WIM Communications

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Development of New Data Collection Techniques

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  1. NYSDOT Traffic Monitoring Section Todd B. Westhuis, P.E. Development of New Data Collection Techniques ITE/MPO 2004 Technical Conference

  2. Data Collection Technologies • Sensors/Hardware • Mobile Traffic Monitoring Platform • Permanent Acoustic Site • Micro Loops • High speed WIM • Communications • Trafmate Digital Pagers • Trafinfo Tri-Mode Cellular Modems • Software Applications • Highway Data Management System • Highway Data Store • Traffic Count Editor • Traffic Data Forecaster

  3. Mobile Traffic Monitoring Platform

  4. SAS-1 Acoustic Sensor Each “Blob” Shows Position and Strength of a Vehicle’s Acoustic Intensity - Lt Green is Weak - Dk Green/Red is Strong Lane Switcher Traffic in Other Direction Detection Indicator (Magenta Markers) Time SAS-1 Lane 3 Lane 1 RS Lane 2 LS 91 Look Directions (0 Deg to 180 Deg) “Side Fire” Geometry

  5. Mobile Platforms • Trailer equipped with a 35’ telescoping mast and SAS monitor • Powered by 50 watt solar panel and two 100 aH deep cycle batteries (12V DC) • Interface for programming and data download to laptop • Trafmate digital pager for data download via telemetry

  6. Special Studies • Non-traditional counts • Seasonal snowmobile and ATV studies • Siting new equipment • Event coverage • Traf Mon Section support offered

  7. Permanent Acoustic Site • Equipped similarly to platforms • Cost: ~$8-12K including installation

  8. Micro Loop Traffic Monitoring Site

  9. Under Bridge Deck Application

  10. Van Wyck Expressway • Site installed by NYSDOT forces on elevated 8 lane section of I-678 in Queens • 142,000 AADT • Two probes per lane • Currently collecting volume data via telemetry

  11. A Cost Effective Method to Obtain ‘Weigh-In-Motion’ Data

  12. Weight Data Needs • Planning • Targeted Commercial Vehicle Enforcement • Joint New York State Police/NYSDOT effort • 2002 Pavement Design Guide

  13. Guide’s Three Hierarchical Levels of Design Inputs • Level 1 – Site Specific Measurements • Traffic Volume • Vehicle Classification (axle configuration) • WIM (Axle load distribution) • Data collected within or near project area • Level 2 – Correlations • Regional values derived from larger dataset • Similar truck traffic and truck weight characteristics • Level 3 – Default Values • National defaults configured with local knowledge

  14. “Do More With Less” • Traditional WIM Sites • Expensive to equip • Expensive to install • Expensive to maintain • DOT Traffic Monitoring Programs • Staffs shrinking • Funding limited • Cost effective alternatives needed

  15. 2001 Construction

  16. ‘WIM Card’ Development • Desire to collect volume, speed, classification and truck weight data using piezo axle sensor inputs to an auto-calibrating traffic recorder • Added functionality for existing traffic monitoring sites • Provides a cost effective and safe weighing solution when compared to other WIM technologies • Nineteen sites now online statewide • Periodic testing to verify accuracy • Continuous monitoring and collection

  17. WIM Site Features/Capabilities • Auto-calibrates using steering axle of a Class 9 truck with user selected sample size • Meets ASTM 1318-02 accuracy requirements for Class I piezos (ASTM Type II) • Auto-gain control detects input signal from the piezo sensor and adjusts gain to provide best axle detection and resolution • Solar powered • Cell modem for communications • Seamless integration into Statewide Traffic Monitoring System • Trafman software for auto polling • Automated quality control checks

  18. Archived Data Formats • Standard is FHWA W card • Enhanced W card • Vehicle time stamped to 1/100 second • Speed recorded to 1/10 mile per hour • Quarterly report for stakeholders • Summary by site of volume, speed, class and weight data in user friendly format • Design Guide inputs and ESALs • Raw data available by request

  19. Costs • Four Lane AVC/WIM site installation • $50K (Upstate) • $80K (Metro New York City) • WIM Enabled TCC 540 ATR • $10K per unit • Data Rate • $20-$30/day

  20. Site Maintenance Contract • Performance based maintenance contract highly recommended • Payment based on “per day of data” • Full 24 hours with no interruptions or failures • Liquidated damages • Site “down” for more than five days • System drops below 95% readiness • Over and Above Items • New construction or upgrade of sites

  21. “Cutting The Cord”Wireless Communications and Traffic Monitoring Sites

  22. Communications: Why Wireless? • No infrastructure costs • Service fees less than landline • Eliminates line quality issues • Coverage issues resolved • Digital • Low power • Accommodates use of photovoltaics • Flexibility • Equipment choices • Coverage choices

  23. NYSDOT’s Sites • 169 Locations in Statewide Traffic Monitoring System (Continuous Count)

  24. Tri-Mode CDMA Cellular Modem • Dataremote CDS 9022

  25. New York Cell Sites

  26. Dataremote CDS 9022 • Equipment Costs • $695 for cell modem • $70 for antenna • Monthly Service Costs

  27. Digital Pager • Trafinfo.com Trafmate

  28. Metro New York City Pager Sites

  29. Trafmate • Equipment Costs • $685 for digital pager including antenna • Monthly Service Costs

  30. Two-Way Digital Pager • Trafinfo.com Trafmate 6

  31. Trafmate 6 • Equipment Costs • $795 for digital pager including antenna • Monthly Service Costs

  32. Highway Data Management SystemHDMSHighway Data StoreHDS

  33. DATABASE TOOLS • HIGHWAY DATA MANAGEMENT SYSTEM (HDMS) • An Oracle-based relational database and application to process and manage highway and traffic data with linkages to other NYSDOT data systems • HIGHWAY DATA STORE (HDS) • A data warehouse tool to access and query data maintained in HDMS

  34. HDMS • All data in one consistent database • Replaces flat file mainframe data storage system • Traffic and pavement data linked to highway data • All volume, speed, classification and truck weight data captured and archived on network • State, county and local facilities • Extracts to support current users • Business rules/list of values driven • Feature based as opposed to segment

  35. Highway Data Store • An Oracle Discoverer-based data warehouse tool to access the highway inventory and traffic monitoring data of the NYSDOT Highway Data Services Bureau • Refreshed nightly with data from HDMS • Pre-packaged data sets available • Full data access offered

  36. HDS Implementation Sequence of user implementation: • NYSDOT Highway Data Services Bureau staff • NYSDOT Main Office “super users” • NYSDOT Regional Offices/other Intradot users • MPOs/FHWA web-based access

  37. Traffic Count Editor(TCE)

  38. TCE • Analyze, maintain, and submit short-term volume, classification and speed counts • Standard file formats found in NYSDOT EI 01-001 “Traffic Monitoring Standards” • Includes automatic processing conditions/checks • Any combination of conditions of 15 different types can be configured centrally and distributed to users • Used by thirty-three NYSDOT county and Regional offices

  39. Traffic Data Forecaster(TDF)

  40. TDF • Evaluates historical AADT data and determines short- and long-term traffic growth rates based on user selected criteria • Applies these projections to determine AADT forecasts and estimates for sites without annual counts • Produces a variety of summary reports and file extracts

  41. Traf Mon Future Directions • Road Weather Information System (RWIS) • Road temperature sensor input on WIM board • Installed in shoulder at test site • Real time temperature data for use in deicing operations • Commercial Vehicle Enforcement • Augment weigh stations with High Speed WIM to enable continuous monitoring of locations • Information Exchange Network (IEN)

  42. Traf Mon Future Directions • Micro Fuel Cell Venture? • Backup power source • All traffic data available through GIS (Arcview) • On target for completion, November 2004 • Traffic controllers for data collection • Counts at intersections • Piezo inputs to obtain vehicle classification data

  43. A Plea To The ITS Community • Don’t forget us! • Archive and share your data • Build on successes • Early partnerships with ITS & Traf Mon in NYSDOT Region’s 1, 6 and 8 • Additional hardware and/or software modifications

  44. Questions? The NYSDOT Traffic Monitoring Section Thanks You For Your Interest In Our Program

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