Err... well... I live in Austin currently.

I'm describing the red line which goes from downtown to Leander. (The one I linked to.) If you're describing some other line then sorry for the confusion, I didn't actually know there was another rail line. There are plans to build a green line to Elgin but AFAIK that's still under construction.

The red line is mostly single-track, but there are several specific segments of dual-track allowing trains to pass each other, which is why they're able to support multiple trains in both directions.

It's still a crappy schedule -- even during rush hour it's still no more than two trains an hour. Supposedly they intend to start running it every 15 minutes once they add some more dual-track segments.

Maybe it was worse when you lived here?