Sacramento's "Across the Top" project:

Sacramento's "Across the Top" project:
http://www.ccmyersinc.com/current_projects.cfm?ID=45

We pass by this during our commute...we wonder what those bundles of purple tubes are...they look like they get fed into the paving machine. : o |

An example image...the hexagon bundle hanging from the crane represents the source of my curiosity (via):

UPDATE: they seem to represent bundles of dowels inserted as part of an In-The-Pan Dowel Bar Inserter (IDBI) system. You can see video of their insertion as part of this WMV file or more at their page.

UPDATE, 2014-01-04: The names on the equipment read "Guntert & Zimmerman" and seem owned by CC Myers. It seems to represent a slipform paver (S1500?) and the other one seems to represent a texture cure machine (TC1500?). G&Z call their equipment Compact Dowel Bar Inserter (CDBI).