[brian51]

Pierre,

thanks for your third posting in your CJ already,
which is really giving us a good idea how traffic works in regards to these inter city connections...

The east side of the highway seems to have a pretty large area of Residences over there. And so I am not surprised by looking at the development over there , that you can generate this much traffic on your networks.

Your pics do not show the commercial zone in Arcens, so yea i would assume that the commute to the jobs there must be a fair distance away. So it does look like the neighbor link  over to Marlande would be the closer option ( at least for Sims living on the east side.)

Not a single Sim comes from the west (= from the left) side:

I was just curious how far away are the residences on the West side of the city in relation to the neighbor connection ?

This means that it will not be easy to reduce the car and bus traffic on the intercity link between Arcens and Marlande.

I agree that it may be difficult to divert the traffic at this point to other optional job sites. But I do think you can engineer perhaps some additional options to handle traffic. Since there does not appear to be a lot of room for above ground networks, I would suggest perhaps subway and possibly underground rail  to try and handle a portion of the traffic to reduce congestion on some of the other networks.

What do you think of this plan ?