By Tarek Elbaradie|2025-08-31T05:06:41-04:00August 31, 2025|Categories: Global Lessons, Ontario Transit Vision, Transit & Infrastructure + Economy & Growth|Tags: Big Circle Line, climate resilient transit, deep subway tunnels, global metro systems, Global transit lessons, Moscow Metro, multi-layer transit, Ontario Transit Vision, public transit expansion, regional subway grid, sustainable infrastructure, Toronto relief tunnels, Underground housing|