Thomas Pendergast has a tough job. Not only does he have to think like an hourly employee (negotiating with unions), he also has the dubious task of dealing with politics on three levels: MTA, NYC & Albany. Appropriating funds for construction projects is like running for mayor and the US Senate simultaneously; he's constantly on the campaign hunting for dollars so he can keep his platform balanced and strong despite all the people who are trying to chisel off pieces here and there. I don't envy his position.
Mr. Joe Blow, you are head of the MTA. Assuming that you've managed to acquire the funding for ONE new major rail project, what would it be?
Your thinking has to be New Millennium, not IND Second System. New 6-track 4-plat stations are not feasible today. Keep it as close to reality as you can.
#Explain/justify why the service is needed; who benefits from this service?
#Consider wisely if connecting to existing services (TPH, peak direction flow, trunk lines & branches, congestion/choke points, effect on existing service, etc)
#If you use online maps to figure your planning post links so others can follow your thinking
#What kind of equipment/technique will be used for each phase of the job (tunnel boring, cut & cover, above ground, etc)
#Calculate how long it would take from start to finish
#Try to keep your 'Wallyhorse' excitement level to a bare minimum 
Your only judges will be your peers here in the Subway forum, meaning, there aren't any judges, only opinions.
After working your ass off you might only receive criticism but remember this: your efforts are appreciated because you took the time and effort to do it, and for that you have my praise...for whatever that's worth
It can be as elaborate or as simple as you want but keep in mind you're not building a theme park and Etcha Sketch doesn't photograph well.
It's all about enjoying what we do on this forum: discussing real life topics, sharing our adventures and using our imaginations to come up with fantastical suggestions on how to improve service. Here's your chance, Chariman Joe Blow.
To paraphrase Sgt. Esterhaus, "Let's have fun out there".