In 2002, Idaho buried nearly 300 tons of crushed waste glass beneath Highway 75; the material formed 8 to 12 inches of fill under a 200-foot road section - The Times of India
Transport authorities in Idaho turned nearly 300 tonnes of discarded glass into road foundation material under Highway 75, creating a durable structural base while solving a local landfill crisis. The engineering trial, executed along a 200-foot stretch of highway near Ketchum, placed an eight-to-12-inch layer of crushed glass cullet directly beneath the road surface.