Table 4. MSA v. non-MSA Congestion Ratings, 2006 and 2007 (percent)

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  2006 MSA 2007 MSA 2006 Non-MSA 2007 Non-MSA
Omnibus Household Survey n=528 n=454 n=155 n=151
Week prior to interview, not at all congested 27.1 29.0 51.9 66.1

KEY: CI = confidence interval; MSA = metropolitan statistical area

NOTE: CIs for MSA fi gures are 2.5% and for non-MSA fi gures are 4.8%.

SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics, Omnibus Household Surveys, November 2006 and 2007.

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