I have no better data for the broad claim than the claim itself, but IIUC LA only has B and D lines for subway, and those are <23 miles total. Given they opened

I have no better data for the broad claim than the claim itself, but IIUC LA only has B and D lines for subway, and those are <23 miles total. Given they opened over 20 years ago I find it hard to see where LA would have built >20 miles of subway. I skimmed the pages for the lines and don't think they've expanded at all in that time, in terms of underground miles. I assume TBC's figure doesn't include work still under construction. Happy to be corrected, my numbers are best-effort.