Blood on the streets

Can someone please post a proper reference to this Paris HGV ban I keep reading about.

I can't find anything supporting the info quoted on Bill's blog, but several sites saying HGVs are banned from entering and leaving the Paris area at specific times around the weekend. This is in addition to the weekend bans that apply throughout France, but as far as I can work out there are no restrictions whatsoever for Paris during the week.

Here's one, and another.

I'm happy to be wrong, just want to see some semi-official evidence for it instead of what appears to be hearsay.

This is the info page for "livraisons marchandises" from the Ville de Paris.

http://www.paris.fr/viewmultimediadocument?multimediadocument-id=25946