If everybody went to bed at the same time, the whole world would die

... Sayeth Allen Toussaint (via Lee Dorsey). And I think Jane Jacobs would agree.

Her recommendations for multi-use neighborhoods were well known to me, but it was a revelation to read her advocacy for 18-24 hour districts. Her strict condemnation of civic single-use districts were also compelling.

But those districts are here (in the form of large governmen complexes, hospitals, schools, sports facilities and the like), so what to do with the edges which are barriers rather than zippers to connect two unmatched (land use) suitors?