Great info, thanks for sharing!
Ya the western freeway was a thing, not sure if it still is as there hasn't been any news on it for at least a decade.
The VMP upgrade at the 401 even in these plans replaced the free-flowing 401 EB to VMP NB connection with a stoplight. That's a downgrade in my mind and I almost always hit a red here (same with 401 EB to Highbury NB, also being kept as part of that interchange rebuild).
I can tell you locally that ALL the planned 6 lane road widenings have been either delayed indefinitely or outright cancelled. The one exception is the Fanshawe and Richmond intersection, which is currently being rebuilt to contain a short extra lane mostly for buses, right turns and access to various malls/strip malls surrounding it.
Most of the 4 lane widenings have been cancelled too. Adelaide Street North for example got canned due to it not being in line with the city's self-declared climate emergency. That's also one of the main reasons with the 6-laning of Wonderland road failed to pass. (Induced demand, just one more lane bro too)
We may be lucky to see interchanges on the VMP by the 2070s... maybe by then the 401 interchange can be expanded to support free movements.
A north freeway was not part of any plans because even back in 2001 the city was close to developing all the land at it's northern city limit. Today it's pretty much all sprawl. A north route would have to be built by Middlesex country, or the province, or a future regional municipality or possibly the City of London itself if it's borders could be expanded further north.
Regarding rapid transit, I am actually surprised something got greenlit after nearly all the freeway projects in the 50s and 60s got blocked (Highbury stubway was the only result). I am hopeful that more routes can be built once what's been approved is finished... But that will rely heavily on funds elsewhere as cost overruns for the BRT has made the city flat broke. Many infrastructure projects that were planned to start this year have been delayed or shelved due to lack of funds.
The city was targeting ~1% yearly growth in these plans from the 2000s. Since London's growth rate was 10% between the two most recent censuses, it's actually about 2.5% year over year, 2.5x faster than predicted. Current growth rates are likely much higher. There's just too much for the city to do to try and accommodate this growth and financial issues, inflation, BRT cost overruns, supply and worker shortages have really strained the city. I guess we'll see just how much of this gets built... but I think a ring road is a pipe dream now.
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Edit- Posted to the London reddit and some interesting comments there