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

9. 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.

11. 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

12. 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

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

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