Figure 8: Monthly Variation in Houston's a.m. and p.m. Congested Hours due to seasonal Factors

Figure 8: Monthly Variation in Houston's a.m. and p.m. Congested Hours due to seasonal Factors

Difference in congested hours per day from the trendline

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  Houston a.m. seasonality Houston p.m. seasonality
Jan 0.120371534 –0.337053826
Feb 0.186288597 –0.21596855
Mar 0.074762993 0.111950393
Apr 0.341257506 –0.119587216
May 0.008797736 –0.13447194
Jun –0.121706241 –0.084482429
Jul –0.603756178 0.299303848
Aug 0.024254885 0.015892458
Sep 0.401949614 0.052441067
Oct 0.270082678 0.078890677
Nov 0.021280074 0.28745362
Dec –0.723583196 0.045631897

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