| Comment | Both. The final approach to each individual route seems far from decided, but the latest proposals suggest it will see a mix of:
1) Regrading / categorising some existing suburban rail routes into **"Heavy Metro"**, as well as adding some new lines of this type. This seems to indicate a new heavy rail route running via QUEH, Renfrew to the Airport, but there are other examples in the map. I take "Heavy Metro" to simply mean retaining and adding to the existing heavy-rail network but having it branded under the same catch-all "Metro" heading. In London they have two types of trains running on the Underground network, even though the average user might not notice. Although it's all branded the same way, some London underground trains are very similar to heavy long distance trains. So that might be what's planned here, with those things coming under the heavy category.
2) Adding entirely new routes, named here as **"Light Metro"**. So I'm presuming that means anything between on-street trams (like Edinburgh), segregated light-trams, or all the way up to something like Copenhagen's metro which used very light vehicles on viaducts and in tunnels. It could well end up being a mix of all of these "Light Metro" types, depending on what each route calls for. |
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