Figure 5: Monthly Variation in Chicago's Weekday and Weekend Congested Hours due to Seasonal Factors

Figure 5: Monthly Variation in Chicago's Weekday and Weekend Congested Hours due to Seasonal Factors

Difference in congested hours per day from the trendline

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  Chicago Weekday seasonality Chicago Weekend seasonality
Jan –0.850994748 –1.516295261
Feb –0.231930471 –0.076067491
Mar 0.039622471 –0.523434721
Apr –0.384798326 –0.727092056
May 0.366345709 –0.142304754
Jun 0.525618652 1.774815683
Jul 0.237330595 0.734857453
Aug 0.238419204 0.833121889
Sep 0.674736147 0.101100659
Oct 0.54646909 0.618079763
Nov –0.129485633 –0.571617467
Dec –1.031332691 –0.505163697

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