Comment by theluketaylor

Overground is a great example of how to re-use existing rights of way, but I do think London is a bit in the sheer number of under or dis-used lines that were available. DLR is a similar re-use of existing rights of way, but there just are not that many places that had such a huge explosion of rail in the 19th century that is now derelict and available for re-use.

I do think Overground is a great case study in the value of both branding and service. Quite a bit of the Overground was already operational passenger rail, but it was fragmented under different operators, names, and service patterns. TfL wisely brought it under a single brand, making it simple to understand, especially as part of the larger London transportation network.

TfL also arranged consistent service, newer rolling stock, and full electrification and made the service pretty reliable. Turns out if you offer good frequency people will make use of it. Wild.

Here in Ontario we've been watching Metrolinx try and fail miserably to build out an RER/S-Bahn system out of the GO network. We're 8 years into the GO Expansion plan and Metrolinx has yet to raise a single catenary pole. It's beyond shameful. We're getting tons of shiny stations with huge capacity, but no real service has emerged (or shows any sign of emerging) to get value from all the dollars spent.

Metrolinx has been unwilling to make the leap to metro operations with line isolation and high floor platforms. They are also unwilling to move to electric multiple units to realize acceleration gains. They are trying to cling to scheduled service and commuter-oriented patterns, just because that's how it's always been done.