For every natural gas well in Pennsylvania targeting the Marcellus Shale, the heavy truck traffic it requires could be causing up to $23,000 in damage to state roadways, according to a study commissioned by the Rand Corp. and conducted in part by Carnegie Mellon University…
 While the costs are significant, “they look like they’re manageable with the right policies,” said Constantine Samaras, who led research as a senior engineer at Rand and now teaches engineering at Carnegie Mellon University.
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