Monocle’s Carlota Rebelo reports from the World Economic Forum’s Urban Transformation Summit in Detroit. We hear about a new innovation district in Milan, Boston’s 24-hour city ambitions and the master plan for AlUla in Saudi Arabia. Plus: creating pocket forests and mobility in San Diego.

A bridge designer’s guide to connecting communities
29:40

Tall Stories 505: Linz’s Grottenbahn – a dreamland surrounded by history
05:51

How major events have influenced Milan’s urban infrastructure
30:53