You can't really compare costs and ignore the level of corruption. In e.g. Russia the only reason why subway costs $500M/km is because at least two thirds of th

You can't really compare costs and ignore the level of corruption. In e.g. Russia the only reason why subway costs $500M/km is because at least two thirds of that money immediately vanishes into the various off-shore companies owned by the various oligarchs, government officials, and cronies thereof. Same with highway construction. Someone once jokingly "calculated" that it's cheaper to pave the roads with foie gras there.