Coincidence?

Has anyone else noticed that very recently THREE tankers have destroyed important elevated freeways in three states since the end of March?


http://www.cnn.com/2007/US/04/29/highway.collapse.ap/index.html - April 29, 2007 - East Bay, CA


http://www.chron.com/disp/story.mpl/front/4754540.html - April 27, 2007 - Houston


http://en.wikipedia.org/wiki/Interstate_375_(Florida) - March 27, 2007 - St. Petersburg, FL

Doesn't this seem a bit much to be a coincidence?