As stated, there is such a huge area of the game to explore, and even more so in promods.
You can choose where to go and drive, those VTC's are large enough to populate other parts of the game map.
Don't like the chaos in which C-D Brings, then it's simple. Don't go there, it's one road between two cities.
However, as explained above, The TMP GM team does what it can to moderate this area, however real life comes first, we are volunteers at the end of the day, this is a persistent issue which many counter measures have been implemented to help "Ease" the congestion and traffic Inc Redesign of Duisburg, own TMP signage, more lanes etc.
Of course, suggestions are always welcome.