Title image credit: CC 2.0 by oseillo

As cities get larger and more people live in them, there's also more traffic. However more cars in cities tend to be a problem.

Barcelona experiments with creating a superblock; a grid of 9 blocks together with very limited access for cars.

Below you'll find a BBC Clip about it.

I think it's a good idea and I also like the fact that the video also shines light on the downsides so far.