@Pepijn @ianwalker That can be the case, but it's not always cramped streets where this happens. There's an example near me in NL of a recent development with wide streets which was designed from day one to provide an essential direct route bikes but where cycling is now banned.
I also saw similar things in the UK in the past. Cycling was banned from central streets of Cambridge in the early 1990s (they "pedestrianized", excluding both cars and bikes as if both these things caused the same harm) and this was the catalyst for the formation of the Cambridge Cycling Campaign. That absurd ban had the effect of forcing cyclists onto longer routes along unpleasantly busy roads which operated as an inner ring road for cars.
If a street was one day a busy through route for cars I find it absurd that the suggestion is that it transformed overnight into a place which couldn't accommodate bicycles.