Where is it?
Taiwan.
What is it?
Rooftop becomes a street.
Who did it?
Owners of the property.
What purpose does it fulfil?
Residential and commercial mixed-use.
What rules does it break (if any)?
It was built illegally without following the building codes.
Can it/should it be integrated into the formal framework?
I think it could If we properly set a regulations and follow with seriously review so that it can take into account safely.
How can the city accommodate informal initiatives?
Provide limited guidance under appropriate evaluation of relevant government.
Does it belong to any "family" of informalities?
Yes, it belongs to informality family in the absence of legal business practices and building licenses.
Are there example of similar informal interventions in different contexts?
Roof typical is not designed for normal use. However, there are diverse informal activities, such as roof theater, living units, dovecote...and so on, happening here depends on the different urban context.