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Data Warehouses

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

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Data Warehouses

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  1. Data Warehouses Transportation leadership you can trust. Applications and Alternatives presented toSafety Data Analysis Tools Workshop presented byEric ZieringCambridge Systematics, Inc. March 27, 2006

  2. 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. 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. 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

  5. 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

  6. 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

  7. 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

  8. 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…

  9. 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

  10. Data Warehouses Transportation leadership you can trust. Applications and Alternatives presented toSafety Data Analysis Tools Workshop presented byEric ZieringCambridge Systematics, Inc. March 27, 2006

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