Figure 3: Monthly Variation in Weekday Congestion due to Seasonal Factors: Houston, Los Angeles, and Chicago

Figure 3: Monthly Variation in Weekday Congestion due to Seasonal Factors: Houston, Los Angeles, and Chicago

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Figure 3: Monthly Variation in Weekday Congestion due to Seasonal Factors: Houston, Los Angeles, and Chicago. If you are a user with disability and cannot view this image, use the table version. If you need further assistance, call 800-853-1351.

NOTE: Each bar represents the degree of departure from the underlying long-term trendline. For example, the December seasonal factor for Chicago of approximately -1 means that, in December in Chicago, the number of congested hours per weekday is approximately 1 hour less than the overall trend for the weekday congestion.

SOURCE: Calculated from data used in preparation of Federal Highway Administration, Urban Congestion Report, April 2004-April 2007.