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ITS as a Traffic Data Resource.

Workshop C6

Ralph Gillmann at FHWA

ITS Traffic Data Collected

Traffic volume
Traffic speed
Vehicle classification
Traffic incidents
Lane occupancy
Road and weather conditions
Current & scheduled work zones

Pie chart of ITS detectors for HPMS: 41% ITS detectors used for HPMS, 16% no ITS dectors, and 43% ITS dectors not used for HPMS.

Archived Data Management Systems (ADMS)

Data sharing and re-use (" Collect one time, use many times" )
Integrated data archiving (ITS and non-ITS data sources)
For operations, planning, & policy (ITS and non-ITS applications)

ADMS Websites

Caltrans PeMS - pems.eecs.berkeley.edu/Public/index.phtml
Houston Transtar traffic.tamu.edu/hist/historydata.html
Maryland CATT Lab www.cattlab.umd.edu/cf/
MnDOT TMC www.d.umn.edu/~tkwon/TMCdata/TMCarchive.html
Washington TDAD www.its.washington.edu/tdad/

Other ADMS's

ADMS Virginia
Cincinnati ARTIMIS
Detroit MITS
iFlorida Data Warehouse
Mobility Technologies®

Caltrans PeMS ADMS

Screen shot of the PeMS website on Freeway Performance Measeure System. Users must login with Id and Password.

Caltrans PeMS.Detector Health

Screen shot showing Detector Health of Freeways on I-15N.

Caltrans PeMS.ADT Variation

Screen shot of Caltranas PeMs ADT variation. It shows Friday as both highest average daily travel (ADT) and variation, with the lowest ADT on Sunday, but the lowest variation on Tuesday.

Houston ITS Data

Screenshot for accessing Houston's historical traffic Information or ITS data System at http://traffic.tamu.edu/hist/historydata.htm.

Houston Travel Times

Screen shot of Houston Travel Times which provide departure time, travel time, and average speed for AM peak and PM peak. Also found on their website.

Maryland CATT ADMS

Screen shot of Maryland's CATT ADMS lab webpage. It shows ability to click on box for roadway in maryland, by time of day and day of week and will provide graphs and data based on your set criteria you wish.

Maryland CATT Plot

Screen shot of Maryland's CATT Plot graph, showing traffic data points.

MnDOT TMC ADMS

Screen shot of Minnesota TMC ADMS website. It is a data archive continuously collected by the Traffic Management Center of Minnesota.

MnDOT TMC Plot

Screen shot of Minnesota's TMC plot of data point for Volume and Occupancy.

ADUS Website

Screen shot of FHWA's ITS Archived Data User Service page.

ITS Data Standards

ASTM Archived Data User Service Subcommittee (E17.54): a) Standard Guide for Archiving and Retrieving ITS-Generated Data (E 2259-03), and b) Metadata and traffic data standards
NTCIP Data Collection Monitoring (DCM) i.e. Object Definitions for DCM (NTCIP 1206)

Traffic Data Quality Measurement

Action Plan recommendation
Define traffic data quality metrics (i.e. Accuracy, Completeness, Validity, Timeliness, Coverage, Accessibility)
Framework for traffic data quality
Guidance on traffic data quality

ADUS Cross-Cutting Study

Linking Operations & Planning Data (i.e. Benefits and costs)
Focus on improved: a) planning, b) program assessment, c) traveler information, and d) operations
Report early 2005

Applications of Archived Data Operational Test

ADMS Virginia:

Virginia DOT / Univ. Va.
Hampton Roads
Smart Traffic Center

Field Operational Test:

Improved TMC operations
Improved regional planning
Improved traveler information

Mobility Monitoring.Program

Objectives:

Monitor mobility and reliability trends
Provide " proof of concept" and technical assistance

Archived data from 23 cities:

Very detailed data
Point-based sensors
Computer-intensive processing

Questions?.Comments?.Examples?

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