I would think 850 m would be fine on the surface as well.
-hold on there -- maybe some folks don't object to schlepping 0.85km to a stop, but there are a lot of people whose access to good transit would be significantly diminished with such wide spacing
-stop spacing is a trade-off --somebody always loses -- but you ought not risk seriously hurting local ridership by ignoring those who can't/won't walk so far
-i was being full of facetiousness in my mention of the old ladies -- the intermediate stops that would be lost (if transit service went underground) are less important than the major, but are not insignificant --and much more so on Eglinton than Sheppard, IMO
-by no means does this suggest that underground stations be built closer together -- at about $100m each, ~800m spacing is "acceptable" because the cost of extra stations is unacceptable
- but instead that the TTC continue decent surface service above underground portions (FS <10min)
-this raises a problem for planning a new line however -- as mentioned before, decent auxiliary surface service can actually bleed off ridership >> a big problem when trying to justify overbuilt/overplanned lines
--there's a "danger" that enuf riders vote with their butts and stick to the auxiliary service cuz they're only going a short hop, or it means less walking, etc.
-- then you look dumb for designing a massively swank line while a noticeable number of lazy, lame plebes insist on riding buses up top (*sarcastic again*)
--so you make damn sure the resulting surface service is crap when the underground opens (Sheppard East bus to Yonge) >> no one rides it and you look vindicated
[okay. so no one ever sat in a meeting and said let's screw the people at these minor stops -- but ignoring them could have the same effect]
>then there's another city planning trade-off: pedestrian traffic may alter after undergrounding with business dropping at intermediate stops and growing near new stations
>dislocation comes with such change, but there are people's livelihoods to keep in mind
>that's why DRL works for me if it does not parallel or remove any streetcar lines: I agree with the idea that Queen St.'s intricate urbanity would be dramatically affected were the 501 replaced by subway stops .85 klicks apart