Other countries have had high speed rail for decades. Now, California wants to build high speed rail from San Diego to Sacramento. Rail is by far the cheapest and most carbon friendly way to ship goods. High speed rail would reduce carbon emissions and provide an alternative way to get from LA to SF, as the train ride would be a mere 2 1/2 hours.
It will cost billions to build and, when you think about it, is a necessity. California and the rest of the US needs a modern high speed rail system.