Safety Data and Analysis in Developing Emphasis Area Plans (2008) / Chapter Skim
Currently Skimming:
Pages 8-15
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From page 8... ...
In these cases, the analyst should contact the state agency that serves as the custodian for the statewide crash database and request copies of the computerized data for their jurisdiction. The statewide crash database custodian differs from state to state, but is usually either the State Police (or State Highway Patrol)
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From page 9... ...
While it is generally agreed that state police and highway patrol officers provide more consistent and accurate crash data than their local counterparts by virtue of their greater familiarity with crashes and, typically, more extensive training, few states maintain the kind of quality-control measurement program that would support interagency comparisons of accuracy or completeness of crash report data. When using crash data from a single source, such as a municipal police department, it is important to know that agency's reporting practices and how supervisors review each crash report before it is finally submitted.
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From page 10... ...
In addition, targeting roadway treatments with fatal data is questionable since most factors that turn a crash into a fatal crash are not roadway-related – they are other factors such as driver age or seatbelt use. It is often tempting to conduct analyses using only fatal crash data because the state and national targets all address the number and rate of deaths on highways.
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From page 11... ...
MCMIS crash data from 2004 onward are of considerably higher quality and completeness than are the data for prior years. Roadway Inventory Data State Inventory Data Each state highway agency and some local transportation and public works departments, and regional planning agencies (e.g., MPO, RPA, RPC)
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From page 12... ...
The ongoing development of asset management databases by state and local highway agencies will also provide a potentially valuable source of roadway and intersection characteristics data. These data sources may be particularly useful in development of safety plans if they can be linked to the location reference system used in crash data.
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From page 13... ...
Often, these systems rely upon other components of the traffic records system to provide information on injury mechanisms or events (e.g., traffic crash reports)
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From page 14... ...
Even crashes on private property may have some use for special analyses. One example would be an analysis of crashes in which one or more vehicles is backing up – the vast majority of such crashes occur in parking lots and are usually not recorded in the statewide crash database.
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From page 15... ...
Trauma registry data and emergency medical services (EMS) data can potentially be used to enhance the completeness of crash data in much the same way as medical records are used to enhance crash data through the CODES database (see above)
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