It isn't just the USA: India has mass transit construction cost problems and could learn - if only they shared a language. Not to mention France (France is better at controlling costs than the US, but still not cheap)
In the US Spanish speakers tend to be poor and thus not in position to do anything about costs if they did look into it.
I'm sure Indians who wanted to go over to Barcelona to learn about the transit system would have difficulty finding a common language, or paying for a couple of translators.
In the US Spanish speakers tend to be poor and thus not in position to do anything about costs if they did look into it.