1. Transportation leadership you can trust. presented to Safety Data Analysis Tools Workshop presented by Eric Ziering Cambridge Systematics, Inc. March 27, 2006 Data Warehouses Applications and Alternatives

2. 1 A Little Background Cambridge Systematics: Leading transportation consulting and full software/IT firm Recent safety-related software/IT projects: Commercial Vehicles: Leader in CVISN: credentialing & electronic screening systems TransXML – Data interchange standards for transportation – Prime; Lead in the Safety Business Area Massachusetts Traffic Records Contractor

3. 2 Data Warehouse - Overview A repository for safety-related data Typically assembled by compiling information from many participating agencies and organizations Key challenges are in integrating and creating linkages across the data. Fundamental infrastructure for value-added applications that tap into the data warehouse.

4. 3 Safety Portal Point of access to the Data Warehouse Practical tool for safety evaluation and planning Tabular retrieval Map-based retrieval Analytic models Central point for communication for a statewide (regional, multi-state corridor) safety community

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17. 16 Things to Consider – Alternatives Crucial Issue: Linking of information from varied sources Basics generally contained in the crash records file (MMUCC or NHTSA/TransXML standard) Advanced analysis requires additional linkages: Incident ID: crash, EMT Driver license/ID: Citations & other driver records Location: crash, characterstics of roadway, pavement, guard rails, etc., traffic and characterstics Other Personal ID: linkages to medical records; patient IDs Planning applications go one step further

18. 17 Things to Consider - Project Planning User Needs Assessment Which user communities are important? Which capabilities are essential? Which features drive data quality? Incremental Implementation – Roll out in phases. Encourage evolution of needs and system design Invest in manageability Build a system that can be readily maintained and updated

19. 18 Things to Consider – Technical Issues Hardware and hosting (web, Intra/Internet, security) Choice of operating system and database Crucial Documentation (beyond user guides) System Design and database documentation Disaster recovery plans System administrator documentation Transition plan

20. 19 Things to Consider – Administrative Issues Intra-Agency Legal Agreements (Liability, DPPA, etc.) Controlling Access to Data Public Records Limits on Personal or Highly Personal Information Tighter Linking of diverse databases  increased administrative controls And one more thing…

21. 20 One More Thing… Your data warehouse will soon be obsolete… Internet enablies live integration of diverse databases “Web Services” – each system accepts requests from many applications to deliver records, tables, and other information Many issues will disappear: redundancy, scheduling updates, security and administration Plan for next generation of primary systems; design and build incrementally

22. Transportation leadership you can trust. presented to Safety Data Analysis Tools Workshop presented by Eric Ziering Cambridge Systematics, Inc. March 27, 2006 Data Warehouses Applications and Alternatives