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Benefits and Costs from the Caltrans IRIS Open Traffic Management System Demonstration Study

Benefits and Costs from the Caltrans IRIS Open Traffic Management System Demonstration Study. Michael Darter ● Ty Lasky ● Bahram Ravani. Advanced Highway Maintenance & Construction Research Laboratory University of California, Davis. Problem → Solution → Result. The Problem….

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Benefits and Costs from the Caltrans IRIS Open Traffic Management System Demonstration Study

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  1. Benefits and Costs from the Caltrans IRIS Open Traffic Management System Demonstration Study Michael Darter ● Ty Lasky ● Bahram Ravani Advanced Highway Maintenance & Construction Research Laboratory University of California, Davis

  2. Problem → Solution → Result The Problem… • ATMS not deployed in 5 of 12 Caltrans Districts • Why? Cost The Solution… • Implemented the open IRIS ATMS • Extended & customized IRIS for Caltrans The Results… • Provided ATMS capabilities • Extendible, reliable, scalable • Reduced life cycle costs 72% • High relevance for ITS research • Importance of cooperative approach

  3. Project TeamCaltrans IRIS Demonstration Study Thank you to our partners… • Caltrans • District 10, also 1 and 5: running IRIS • HQ Traffic Operations: guidance & management • Division of Research & Innovation: funding • HQ Information Technology • Mn/DOT: IRIS leads • AHMCT: executing demonstration study • FHWA

  4. Study Goal Reduce ATMS life-cycle costs …via demonstrating the feasibility of implementing and extending the IRIS open-source ATMS in Caltrans District 10 • Lowers costs? How much? Why? • Hidden costs? Challenges? • How well does multi-state cooperation work? • Is using a single code base effective? • IRIS questions… • Effort to integrate with existing systems? • How reliable? • Customize? Our Questions…

  5. Existing Proprietary ATMS • Built with proprietary software + hardware • Caltrans doesn’t own code • Multiple code trees (4) • Access to code is covered by NDA • Used in 7 of 12 Caltrans districts NDA Code Base Code Base Code Base Code Base Consultants Caltrans Districts Caltrans Districts Caltrans Districts University of California, Davis

  6. Open Source What ‘open source’ means… • Legal definition + development method • Source code is freely available • Modified code must be shared (GPL) • Way of building a knowledge community • Shared cooperative development Tends to view software as knowledge, less as a product

  7. Screenshot: DMS + Traffic + Incidents

  8. Caltrans District 10 IRIS Capabilities • DMS control and monitoring • Integration w/ existing Automated Warning System • Video monitoring and PTZ control • Traffic: speed, flow, density, 30 second • Integrated mapping w/ field elements, roads • Real-time CHP incidents • User authentication, permissions • Reporting • Not used • Travel time, VSL, ramp meters

  9. IRIS Server Machine Traffic Server 30 second traffic IRIS Application Server Incident, RWIS feed D10 Systems Caltrans D10 IRIS Architecture LDAP IRIS Clients DMS Server IRIS Video Server DB Proprietary DMS protocol Field Hardware Field Hardware Field Hardware

  10. Five Year Cost Comparison(for one Caltrans district) 72% cost reduction + More development hours per dollar spent

  11. 1. Acquisition ATMS Costs(for one Caltrans district) This is a 98% cost reduction compared with the existing ATMS system

  12. 2. Customization & Configuration Costs The use of open-source encourages competition.

  13. 3. Annual Maintenance Costs(for one Caltrans district) This is a 68% - 86% cost reduction *Based on assumed $150,000 per year contract price per FTE

  14. Estimating the Dollar Value of IRIS What is the dollar value of IRIS? SLOCCount uses COCOMO (COnstructive Cost Model) The total dollar value of the Caltrans IRIS project.

  15. IRIS as an ITS Research Platform Provides a platform for… • Multiple users connected to a server • Server connected to multiple sensors • Open-source driver architecture • Support for XML data feeds • Low band-width communications protocol • Object persistence • Multi-user • Simultaneous access to data • Queuing • Sophisticated roles, user permissions • Read / write / create / delete access down to object attribute level

  16. Collaborative Model Mn/DOT WYDOT AHMCT UC Davis Caltrans Districts WisDOT Shared IRIS Source Code Base (knowledge) Caltrans Districts Caltrans HQ & Districts Consultants Existing proprietary products Universities • Free information flow  innovation • Shared development  network effect

  17. Benefits of Collaborative Approach • Higher code quality • Better design • Better testing • Better planning • Lower risks for new projects versus start-up

  18. Challenges …with using open-source + commodity hardware… • Explaining how this approach is different • Who owns the software? Everyone • Who controls the software? • Difficulty of managing software development • Collaborative complexity • How will this work with many agencies? • Sustainable private sector involvement? • What else?

  19. Conclusions The results observed in the IRIS Demonstration Study show that open-source + commodity hardware… …is effective at providing ITS at a dramatically lower cost • Lowers costs, 72% over 5 years • More development time per dollar spent • Lowers legal friction • Provides deployment path • Reduces development risks • Puts DOTs in the driver’s seat Goal: maximize innovation + minimize costs

  20. The End • AHMCT: • Ty Lasky, talasky@ucdavis.edu • Bahram Ravani, bravani@ucdavis.edu • Michael Darter, olsendarter@ucdavis.edu • Caltrans: Stan Slavin, stan_slavin@dot.ca.gov • Mn/DOT, Jim Kranig, jim.kranig@dot.state.mn.us • http://iris.ahmct.ucdavis.edu

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