Your question does not make sense so how I can rebut it? A direct continuous rapid transit service along Yonge Street through all of Richmond Hill-Thornhill is better than interrupting that flow by having to transfer at RHC.
It sounds like you're saying that you hit on Steeles because it is a municipal boundary. But your working approach is to look at current, exists-today development -- your assumption, certainly not mine. I would have thought Cummer would be much more consistent with your assumption. Why would you extend further north to Steeles? Is there a great deal of development at that corner? Condos? What?
Say we opt for LRT, that line could run down to platform level at the subway terminus at Steeles allowing for a cross-platform or one level above transfer, completely integrated.
The same is true of Cummer or, for that matter, Finch. Hey, I know: subway makes no sense, let's just do LRT!
Private ROW down the median of Yonge also guarantees a faster speed through Thornhill, one that although not subway fast could be damn close and with 5-car trainset accomodate almost as many passengers per trip.
If you're heading well beyond, say, the 407, then sure. But if you're not then, first, the speed gain is non-existent or negligeable -- any difference in velocity is irrelevant compared to the simple question of whether or not there is a transfer -- and, second, by replacing buses with LRT you replace buses that run up Yonge and turn to go somewhere, with an LRT and then a transfer to yet another vehicle.
An LRT between Finch and 407, or Steeles and 407 as for whatever odd reason you are suggesting, doesn't make much sense at all.
Some people will not mind the extra transfers if (a) it results in a more direct trip to one's end-destinations which interplays into (b) sparing customers from another transfer once in the downtown. So for CBDers heading to King/Bay, they could opt to enter the subway system and travel one stop, then walk back west to Bay, or they could simply walk directly through the PATH netwrok to their destination. The choice is their's, but I know what I would do in that case. For NYCC there's Leslie/Oriole; and for Midtown there'd be a Don Mills/Eglinton vicinity stop linked to the 'subway'. I'd expect those whom choose not to backtrack from those points to just use the Yonge North BRT or LRT into Steeles Stn, and travel south from there. Everyone desiring south-of-Bloor destinations would find the GO service faster, or so marginally less fast that it won't really matter to them.
An LRT-ized RH GO line would be faster for those at Leslie/Oriole and Don Mills/Eglinton going to the CBD or to Yonge/Eglinton.
It would be slower for those near Langstaff going to the CBD, and slower for those near Langstaff going to NYCC or to Yonge/Eglinton. In fact, it would be slower for those near Langstaff going to anywhere except somewhere in the east end. Although I am all for a fast route from RHCC to the east end.
Aw, I see sarcasm is hard to detect over the internet. What would you characterize Yonge/407/7 as today?
The same way I'd characterize the Yonge Extension. Planned. (Although the residential and commercial developments have a far greater chance of ever happening than does the Yonge Extension, which won't.)
As higher-density today than the areas around many existing subway stations.
Certainly the mansions around Centre Street don't constitute high-density, do they?
You catch on fast. Nope. Do you think that's why there's no proposed subway station there?
A few high-rises here and there doesn't guarantee a sustainable high-yield of walk-ins as Sheppard subway has proven with all its condo tracts. Most people will have to be bused in. (...)
The point is, Yonge can barely accomodate the number of riders it already has; and once the Finch West, Eglinton-Crosstown, Sheppard East via SSL and Waterfront West LRT lines all feed into it, nothing short of permanently diverting some passenger sects away from the corridor is going to alleviate it.
The Yonge Extension will underwhelm. The Yonge Extension will overwhelm. Pick one.
DRL can help, and linking that line to the RH GO @Wynford Heights would be a good way to create a bi-directional demand for a service starting and ending at Yonge but offsetting load constraints to well of the east of it.
I agree with most of this, except that the fact that it starts and ends at Yonge will not be its primary purpose. Providing for people not to have to go all the way to the Yonge line, when their trips do not start (or, at the end of the day, end) anywhere near the Yonge line, would be a substantial improvement.
Of course, I should hasten to add that, as for the Yonge Extension, I harbour no illusion that this revamped RH GO line with stops that make sense, fare integration that makes sense, and frequencies that induce actual use, will ever happen.