One thing I've noticed in Chicago and NYC is that the old steel elevated structures are extremely loud. However, the few locations in NYC that are made with muc

One thing I've noticed in Chicago and NYC is that the old steel elevated structures are extremely loud. However, the few locations in NYC that are made with much thicker concrete structures significantly reduce the noise. Elevated rail is not inherently noisy, but the majority of examples in the US are. This is why people are against them. If we could fix the noise problem, this could be the optimal solution. I personally think it is possible.