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Visualizations : Condition of U.S. Highway Bridges : Some background on this data from...

Creator: Susanne
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Data file: Condition of U.S. Highway Bridges

Data source: 2001-06: U.S. Department of Transportation, Federal Highway Administration, National Bridge Inventory Database

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Comments (5)

	Susanne saved this snapshot Posted Thursday August 02 2007, 05:06 PM see view for this comment
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	Susanne says: Some background on this data from www.bts.gov: “U.S. totals include the 50 states, the District of Columbia, and Puerto Rico. Structurally deficient bridges are defined as those needing significant maintenance attention, rehabilitation, or replacement. Functionally obsolete bridges are defined as those that do not have the lane widths, shoulder widths, or vertical clearances adequate to serve traffic demand, or the bridge may not be able to handle occasional roadway flooding. Table includes: Rural–Interstate, principal arterial, minor arterial, major collector, minor collector and local roads; Urban–Interstate, other freeways or expressways, other principal arterial, minor arterial, collector, and local roads.” Posted Thursday August 02 2007, 05:11 PM see view for this comment
	Martin Wattenberg says: For a historical view, see: Posted Thursday August 02 2007, 05:21 PM see view for this comment
	EagerEyes says: I think a view that shows how many are deficient in some way as compared to not deficient is interesting – even if it’s not a good use of screen real estate. Posted Thursday August 02 2007, 06:33 PM see view for this comment
	Susanne says: For folks who are interested in other bridge-safety-related visualizations and data, please consider joining our new Transportation Hub: http://services.alphaworks.ibm.com/manyeyes/topichub/Ik76IsOtha6c8U72W78I2- Posted Thursday August 02 2007, 10:31 PM see view for this comment

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