>>1722624>light metro kinda thingsYeah you have to be 100% sure and committed to building an independent network of them. Trains can't run to conventional metro, light rail, or tramway. The reverse is also true with tighter loading gauge.
>bad idea for conversion of existing railwaysHow Paris Metro converted to rubber-tyred guideway while keeping steel wheels and tracks is such a abnormality.
>cut civil engineering costsUnfortunately they have worse capacity, limited capability of expansion Tokyo Toei Oedo Line is suffering from overcrowding (to be fair it is over-extended outside the Metropolis on the outer radial section)
