How to design a city?

the answer is unknown and arguable. although the city of london has implemented a fair few with cyclists and pedestrain and it works whereas when mixing cars with pedestrains it has been less successful and, due to lack of ongoing political backing, they implemented traffic lights where shared spaces existed beforehand.

adding bike lane in the city doesn't necessary mean sharing space, especially when it's separated from the road most of the time, that just made the road to be focus by motorised vehicle only (such as Bloomsbury).