Porous asphalt made roads are much better for the environment and are much safer in general. In terms of cost, the asphalt for porous is about the same as normal asphalt. However, porous roads get more expensive when it comes to the stone bed beneath the asphalt. This is because they require much thicker beds to be laid underneath. But on the other hand, porous roads usually do not need as much digging, so labor costs may be down a little bit. Also, using porous roads could end up paying dividends in the reduction of using stormwater pipes and inlets. With all factors considered, they both would end up costing about the same, give or take, but porous would have an advantage in being far more eco-friendly.
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