A while ago, I drove from Poznań (PL) to Brussels (B) on a Sunday, and noticed that there were several huge traffic jams due to roadworks on Germany's A2 road. Specifically around Hannover and Helmstedt there was quite a lot of near standstill traffic.
Considering that this was just a regular Sunday, I'm going to assume that it's almost always going to be this busy, and that taking this road will generally cost quite some time. Hence my question: is there a different road that I could take, which would save me some time? Google Maps suggests taking the A38 road through Leipzig, Kassel and Dortmund, but I'm skeptical about whether this will be faster.