What are some Zilker parking, shuttle options if the overflow lot closes?

If Austin City Council does opt to close Zilker Park’s overflow parking lot, here’s a look at other available parking and shuttle services to the downtown destination.
http://www.bing.com/news/apiclick.aspx?ref=FexRss&aid=&tid=64c1ac84875a4dbd9e9c081121403391&url=https%3a%2f%2fwww.kxan.com%2fnews%2flocal%2faustin%2fwhat-are-some-zilker-parking-shuttle-options-if-the-overflow-lot-closes%2f&c=15410720107909804130&mkt=en-us