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KEY: TTI = Travel Time Index.
NOTE: The TTI is the ratio of peak period travel time to free-flow travel time. It expresses the average...
Natural disasters, accidents, labor disputes, terrorism, security breaches, and other incidents can result in major disruptions to the transportation system. Although comprehensive data on these interruptions are not available...
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NOTES: A minor injury is one in which the victim was treated and released. A serious injury is one in which the victim was either hospitalized or treated and...
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NOTE: 2004 data are preliminary. General aviation includes any civil aircraft operation that is not covered under 14 Code of Federal Regulations (CFR) Parts 121, 129, or 135,...
The condition of bridges nationwide has improved markedly since the early 1990s. Of the 590,853 roadway bridges in 2003, the Federal Highway Administration found that 14 percent were structurally deficient and 14 percent were functionally obsolete. About 33...
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KEY: U = data are unavailable (for crossings by personal vehicle from both Mexico and Canada in 1994).
NOTE: For definitions see table 1-5...
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NOTES: A minor injury is one in which the victim was treated and released. A serious injury is one in which the victim was either hospitalized or treated and...
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1 Map data are shipments by weight in tons. Waterborne shipments include foreign imports and exports but exclude intrastate shipments.
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NOTE: This map is based on information from the Commodity Flow Survey (CFS). Because the CFS data used in this map are drawn from a survey,...
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NOTES: Interruptions of service include major and minor mechanical failures. Since 2001, if the vehicle operator was able to fix the problem and return the...