The ring binder was a solution to the problem of updating and reprinting pages for the manual. A past backer for our NYCTA reissue campaign (who was a Vignelli Associate) said this, "The binder is extremely difficult to open and close. Pages can easily be ripped out-even with the five ring binder holes.”
Like the NYCTA Standards Manual reissue, our intention for this reissue is preserve this historical piece of design history for archival means, not for practical means.
Printing a book also allows us to include supplementary information like the foreword and essay, something that would not be possible (or would have to be printed separately) if we did a binder.
But above all, the biggest reason was cost. We looked into doing the binder and it was going to be prohibitively expensive for backers.