The chart above comes from the Bureau of Transportation Statistics. It shows monthly data collected on the total number of miles travelled by all vehicles on US highways.
Notice how every year tends to have a similar shaped down-spike and upper peak. The down spike seems to be in January and February, probably because of winter weather. One interesting thing to notice is that the down spike from 2010 is the lowest in 6 years. Perhaps because everyone is trying to Save on Gas.
Make sure to read tomorrow's blog post to find out what advice the Governor of California has for Detroit.