This doesn't sound like Barcelona's superblock concept at all. It sounds like you are talking about mere blocks. The superblock concept only exists in a few pl

This doesn't sound like Barcelona's superblock concept at all. It sounds like you are talking about mere blocks. The superblock concept only exists in a few places so far in Barcelona. It takes (usually) a 3 by 3 grid of blocks and closes the inner streets to though traffic, instead putting playgrounds, benches, bike lanes, and plants there.