Comparison based on statewide data in Texas from 2006–2009 and 2010–2013.
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*SOURCES: Texas Railroad Commission, Texas Department of Transportation and Texas A&M Transportation Institute
Comparison based on statewide data in Texas from 2006–2009 and 2010–2013.
See related story.
*SOURCES: Texas Railroad Commission, Texas Department of Transportation and Texas A&M Transportation Institute