Well, in a flurry of procrastination, I drew up a regional O-Train network for Ottawa. You know, there are some really nice little towns around Ottawa (Alexandria, Renfrew, Almont, Perth...) as well as beautiful natural sites (Wakefield, Norway Bay, Shawville bike paths...) and we would be so much richer as a city if we connected them in a way that neither paves them over or turns them into bland automobile suburbs.
Most of the tracks or railbeds already exist, so all we need are some DMUs, some dollars and a lot of imagination and will
Dashed branches run >45h, solid lines 20-45 minutes and bold lines <20 minute frequencies throughout the day.
I separated the lines into five groups: [N]orth, [S]outh, [E]ast, [W]est and [A]irport (couldn't think of anything better for that last one). The idea is to have the system work much like the S-Bahn or RER system, providing limited urban service along trunk lines as well as suburban and all-day regional service.
I had most of the lines end at Hurdman (pending an extension under Nicholas to Union

) with a station layout made easy for transferring to LRT: people arriving would only have to cross the platform to westbound LRT and the same goes for eastbound LRT and outbound O-Trains. Chaudière station would turn east at the PoW bridge and sink into a station under the old EB Eddy building across from Terraces de la Chaudière with transfers to surface LRT.
I also included some fantasy LRT lines (thick grey lines) like a Bank St. Subway and extensions from Bayshore to the Queensway-Carleton Hospital and Baseline to the rail tracks. There's also Carling/Canal, Baseline/Alta-Vista, Gatineau, Plateau, Hull and Aylmer surface LRT lines, just for the heck of it. I just realised that I forgot the Montreal Rd. LRT though
And yes, some of the names are just invented placeholders, pending more procrastination.