http://www.cement.org/cement-concrete-applications/paving/pe... "However, in climates prone to severe freeze-thaw cycles, some are hesitant to use pervious concrete pavements until it has been proven that pervious concrete can be made to resist freeze-thaw damage." Pittsburgh does go through freeze thaw cycle, so I assume there aren't much problems

https://www.unh.edu/unhsc/sites/unh.edu.unhsc/files/pubs_spe...

According to this, it also reduces the amount of salt needed 75% for deicing and the pavement doesn't seem to have been damaged from reading the abstract.