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Archived Data Management System

Archived Data Management System. Study Advisory Committee Meeting September 25, 2003. Literature Review. Major Data Archiving Projects: California PeMS (freeway performance measuring system) Started in 1998 $2M total cost for production version

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Archived Data Management System

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  1. Archived Data Management System Study Advisory Committee Meeting September 25, 2003

  2. Literature Review • Major Data Archiving Projects: • California PeMS (freeway performance measuring system) • Started in 1998 • $2M total cost for production version • Web-based access with central database located at UC Berkeley • Raw data sent from TMCs to UC Berkeley over Caltrans wider area network • 30-sec flow, occupancy, speed by lane • Imputes missing or incorrect data, daily loop performance diagnosis • Provides delay, VMT, VHT, travel time, queue, …

  3. Literature Review (cont’d) • Major Data Archiving Projects (cont’d) • Virginia ADMS • Started in 2002 • $1M for operational version • Located at Univ. of Virginia’s Smart Travel Lab • 2-min volume, occupancy, speed by lane, incident, weather • Data screening and imputation • Provides performance measures, real-time incident management, 511/ATIS support, historical information, quantitative impact of weather, …

  4. Literature Review (cont’d) • Major Data Archiving Projects (cont’d) • Washington TDAD (traffic data acquisition and distribution) • Started in 1998 • Web-based access with server located in Univ. of Washington • 20-sec volume, speed, density • Data imputation performed • Query generates ASCII format output

  5. Literature Review (cont’d) • Major Data Archiving Projects (cont’d) • Minnesota (traffic data archiving, automation) • Data disseminated through ftp site in Univ. of Minnesota Duluth in zip format • 30-sec volume and occupancy • Automation of AADT calculation

  6. Data Needs Survey • Web-based Survey http://cvoz.uky.edu/ITSurvey/ • Stakeholders: • KYTC (traffic, operations, planning, multimodal, other) • FHWA (KY division and national office) • DOTs (Ohio, Indiana) • ARTIMIS, TRIMARC • MPOs (KIPDA, OKI, Lexington) • KTC • Other

  7. Data Processing Update • Traffic Characteristics • Typical speed distribution • SKYI64003E, MP6.7 • 2 lanes • Friday, December 13, 2003

  8. Data Processing Update (cont’d) • Traffic Characteristics (cont’d) • Take all data points between 4-7pm for the same site during 2002 • Plot speed-flow relationship • According to HIS, the peak capacity of this site is 4400 veh/hr.

  9. Data Processing Update (cont’d) • 2003 Data Completeness • ARTIMIS • January – March 2003 • Segment files (15-min volume, speed, occupancy) • ARTIMIS2003.xls • S-card • sampleScard.txt • V-card

  10. Data Processing Update (cont’d) • 2003 Data Completeness (cont’d) • TRIMARC • January – June 2003 • 18 new detector stations added • Segment file (15-min volume, speed, occupancy) • TRIMARC2003.xls • C-card • Rec3

  11. Web Page Input • Shape files • ARTIMIS and TRIMARC detectors • ATR stations • PDF files showing the locations of detectors and ATR stations • Readme.txt

  12. ADMS Prototype Development • Major Programming Tasks • Database design • Data archiving algorithm and its programming • Quality check and imputation • Query interface • Subcontractor?

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