And San Francisco. https://en.wikipedia.org/wiki/Trolleybuses_in_San_Francisco https://en.wikipedia.org/wiki/Trolleybuses_in_San_Francisco says there are 5 such

And San Francisco. https://en.wikipedia.org/wiki/Trolleybuses_in_San_Francisco https://en.wikipedia.org/wiki/Trolleybuses_in_San_Francisco says there are 5 such systems in the US, and that SF's is the second largest in the Western Hemisphere, after Mexico City's.