Then you will know that Heerstrasse consist of the Bundesstrasse PLUS two roads either side of the Bundesstrasse.
The two side roads take local traffic and means that the junctions across the Bunderstrasse can be much further apart because there are fewer roads join the Bundesstrasse.
Yes we could do the same but it would take a tremendous amount of demolition to create a 60 yard wide path that the Heerstrasse is for most of its length through Berlin. The A41 is about 20 yards wide, the M53 is only 30 yards wide even at the 6 lane sections.
In a time of universal deceit - telling the truth is a revolutionary act. George Orwell
When the debate is lost, slander becomes the tool of the loser. Socrates