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«In France, they simply used low activity nuclear waste for road beds in the countryside, as supposedly nobody stays long enough on these roads to get any harm from it.» - https://news.ycombinator.com/item?id=6869953
Quick DDGing get me http://www-pub.iaea.org/MTCD/publications/PDF/Pub1224_Web.pdf that mention roadbeds use, but nothing more. ‎- 9000