| Comment | A couple of reasons.
Heavy rail is extremely costly to run, and only becomes cost effective when serving large numbers of passengers over long distances. Largely down to the fact trains are heavy, and take a lot of energy (and time) to accelerate and decelerate. This means there's only so many stops you can put on a train line before it stops making sense in terms of journey times.
Some lines in Glasgow work fine as heavy rail, economically speaking.
But some, like the Cathcart Circle for example, are at the higher end of cost inefficiencies and limits in terms of numbers of services. By regrading lines like these to light rail (something like trams or light subway style trains) you can amp up the number of trains per hour and journey times. |
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