401 alignment options (historic)

[Drake]

I recall reading somewhere about the history of the 401 and the proposed alignments through our region. It strikes me that there was a northern (Kitchener) option and a southern (Galt?) option at one point, and the politico's split the difference and placed it where it currently is.

Does anyone have any insight or links to draft documents that support the options considered back in the day?

I am curious to learn where these routes would have been and speculate on how these routes would have changed the region's development.