OK tks

Hi Guillaume,
I did a lot of plotting this morning (despite the fog), and there are some major changes in the area. Used a camera in my car to help with clues for the tunnel, and just as well as the GPS lost signal for a while. My track can be seen on OSM.

1) there is a completely new temporary feed off the motorway to the Kirchberg P&R (which has been made smaller). At certain stages it has three lanes (for bus and turns) but have not bothered with these.
2) The motorway link into the Serra tunnel starts at Rue J Hackin, but oddly enough has no signs that it leads to the A4 to Luxembourg. Also the old busroute & cycleparth paralel stop at the entrance of the Paribas carpark and is broken up from there on.
3) The Tunnel entrance is at the end of new new Paribas construction, then makes a fairly sharp R turn and snakes L & R to where it ends and joins the feed from the Serra rondpoint. That exit point seems to have already been correctly plotted (possibly yourself?)
4) I have plotted building=construction for the new Paribas but it is a fixme as did not work out its actual dimensions.

So, hopefully it will encourage others to tweek all those major changes.
Cheers,
Dan

Hi Gerard,
I was there on Monday, but it was not open yet and could not get very close. However newspaper photo suggest that the road goes parallel until the tunnel starts. Not as shown. I will investigate this on Sunday

Wow Guillaume, you are quick on this one ;)
I have just posted an email to talk-lu which explains the geoportail info I received from them.