Originally Posted by Leisesturm

Where we have a problem is imagining that there is enough physical space to create a practical network of protected bicycle infrastructure running parallel with the pre-existing one. Lowering traffic lights? Continuous sidewalks? When these are the ideas being presented to city engineers I can imagine things don't go well.
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[Your recommendation]...Cars must be removed with exceptions (only) for essential (medical, fire, commercial) vehicles in urban centers.