On Fri, 26 Apr 2013 17:57:04 -0400, Metspitzer
wrote:

Concrete cracks either because of settling or shifting in the earth
below from the time when the concrete mix was originally laid

Read mo How to Mend Cracks in Concrete | eHow.com
http://www.ehow.com/how_7195102_mend...#ixzz2RbnjwWG7

Is there a way to tell if the cracks are caused by geology or if the
driveway was not properly packed before the concrete?

The tennis courts at our recreation department also have some pretty
significant cracks.
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entropy sucks

Average concrete that has no joints is going to crack roughly every 15
feet due to normal shrinkage. How wide are the tennis court slabs
between construction joints?