Scotland's two biggest cities are in a very special and might be unique railway situation. That they have more than one passenger railway line between them.
(1) Glasgow (Queen Street) High Level - Edinburgh. Fast and recently electrified.
(2) Glasgow (Queen Street) low Level via Bathgate. Suburban and rural route.
(3) Glasgow (Central) - Edinburgh via Shotts. Rural.
These ARE separate.
(1) Glasgow (Queen Street) High Level - Edinburgh. Fast and recently electrified.
(2) Glasgow (Queen Street) low Level via Bathgate. Suburban and rural route.
(3) Glasgow (Central) - Edinburgh via Shotts. Rural.
These ARE separate.