[pierreh]

So after you have had enough time to run the game now with the new interchange for several games year,
Are you satisfied with the reduction of traffic congestion in this area ?

After rebuilding the interchange, I ran the city for a few months only, enough to get the traffic essentially back onto the roadways, and see the start of the construction of new buildings. Therefore at this point I can give a provisional answer, which I'll document with 2 pictures.

The traffic in the south-north direction (in the morning commute) has by and large resumed:



The values measured on the old branch of the interchange were 18'772 cars and 363 'buses'; car traffic 'after' is 92% of car traffic 'before', and bus traffic is very close, and small in any case. I have no doubt that, in a few more months of game time the car traffic will increase to reach, and possibly exceed, the old value.

Now, what does this say in terms of congestion? Here is the congestion view of the same area:



It is green all over the place, except where two roadways are stacked over the same tile. Ergo, no congestion at all. For the record, I use a customized 'Euro' version of the Ultra traffic simulator.