What's up with the new barriers on Sixth Street?

AUSTIN (KXAN) -- The City of Austin has replaced the temporary fencing on Sixth Street with a different temporary structure: 42-inch water-filled barriers.
The original temporary barricades, pictured on top, were fences. (KXAN Photo)
The structures are meant to separate car traffic from foot traffic, as the street is now open to cars full-time, as opposed to closing down on Thursday-Sunday nights.The change came in January as a means to prevent late-night crowds that often grow unruly and someti