>>1810208>>first subway 100 years ago>>never upgrade the subwayThey really don't need to upgrade the subway, Glasgow as one of the largest suburban rail networks in Britain.
>>get rid of the trams to make room for more carsBuses, they got rid of the trams for buses. In the 90s they even proposed reopening disused rail lines as light rail lines, but the dissolution of Strathclyde Regional Council and pressure from local bus companies put an end to that scheme, pic related.
>>build a massive motorway that cuts through the cityDue to local geography, traffic entering and leaving Glasgow historically went through the city centre; there were no major routes bypassing Glasgow (with the exception of north-south from England to NE Scotland) since traffic flows were distributed evenly.
>>everyone leaves the city for the suburbsSlum clearances, regeneration, and urban planners did this. Glasgow had below-average car ownership compared to other Scottish cities. It was not the motorway that did this, Comprehensive Development Areas in Glasgow ensured that slum clearances were going to be carried out, regardless of future motorway development.
Your interpretation reeks of someone who doesn't know what he's talking about and is only parroting leftist American-centric talking points.