IRIS (transportation software)

IRIS ( Intelligent Roadway Information System ) is an open-source Advanced Traffic Management System (ATMS) developed by the Minnesota Department of Transportation. It is used by transportation agencies to monitor and manage interstate and highway traffic. IRIS uses the GPL license.

Functional areas

  • Variable speed limit monitoring and control
  • Active traffic management and lane control
  • Congestion Detection
  • Automated Warning System (AWS)
  • Road Weather Information Systems (RWIS) / Environmental Sensor Stations (ESS)
  • Dynamic message sign monitoring and control
  • Ramp meter monitoring and control
  • Traffic camera monitoring and control
  • Vehicle Detector Stations (VDS) for real-time vehicle speed, flow, density
  • Toll tags
  • Incident tracking, monitoring, and storage
  • Data export: real-time traffic, incidents, configuration, etc.
  • Integrated mapping

Supported hardware devices

  • DMS
    • NTCIP Class A, B, C
      • ADDCO Inc.
      • Daktronics Inc.
      • SES America Inc., full matrix DMS, character matrix DMS
      • Skyline: full sized DMS, VSL, scroll signs
      • DMS portable wanco
    • DMS XML: a simple XML protocol for interfacing with external DMS systems
  • Road Weather Information System
    • NTCIP 1204 device driver, validated with:
      • Campbell Scientific CR1000
      • Vaisala dmc586
      • QTT LX-RPU Elite
    • Optical Scientific ORG-815 Optical Rain Gauge
    • SSI
  • Traffic cameras
    • PTZ: Manchester, Pelco D, Vicon, Infinova
    • Switchers: Pelco, Vicon
  • VDS
    • Canoga
    • Wavetronix SmartSensor 105
    • Wavetronix SmartSensor 125
    • EIS RTMS (UDP)
    • EIS G4
    • Caltrans URMS 2070: UDP, TCP, TCP Re-ID
    • Sensys
  • Tag readers
    • Bluetooth : Iteris Velocity
    • Bluetooth : Acyclica
    • Transcore Encompass 6 Multiprotocol Reader

Minneapolis / Saint Paul IRIS System

The IRIS implementation in the Minneapolis – Saint Paul region consists of:

  • DMS: 135
  • VDS: 5452
  • RWIS: 4
  • Cameras: 476
  • Ramp meters: 433
  • LCS: 194 (most can also be used as DMS)
  • Lane marking: 1 (in-road lighting)
  • Static sign with wig-wag beacons: 2

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