I heard the following sentence on YouTube, and don't get the meaning of "as":
Despite only being around the same size as just California, Spain has more than five times the amount of high-speed rail lines "as" the entirety of the US combined has.
(source)
I guess this could be the second 'as' in an "as ~ as" clause. The first one is omitted, and the full sentence seems to be like this:
Despite only being around the same size as just California, Spain has more than five times "as" the amount of high-speed rail lines "as" the entirety of the US combined has.
Do I get it correct, and is it okay to omit the first as here?