I decided to do some digging around tonight on any information pertaining to the plans from the early 2000s regarding London's long-planned "Ring Road" network. I was able to find a wealth of interesting (at least I find it that way lol) content relating to the planning process in two documents. The first document is the
2001 London Long-Term Transportation Corridor Protection Study, and the second is the
2007 Veteran's Memorial Parkway Interchange Class EA. Both documents have been long-since deleted from the City of London website, but executive summaries and info from Public Information Centres (and
design plates for interchanges on the VMP) have been archived.
Starting with the 2001 LTTC Protection Study, the aim of the study was to identify transportation options for what was considered "full build-out potential" of London at the time, which was identified as a city population of 675,000 people (2x the approximate population of 336,539 in 2001, and now 1.6x the approximate population of 422,324 in 2021) based on land availability, servicing ability, and city planning policies. Population growth was identified to most likely be concentrated in the north/west parts of the city, and employment growth was identified to most likely be concentrated in east London, downtown, and along the 401/402, even taking into account for a future of increased work-from-home, as well as London's goal of achieving 15% reduction in single-occupancy vehicle usage. It was identified that the vast majority of London's infrastructure was going to be insufficient due to a multitude of factors, including limits on road widening in many areas and lack of complete through-corridors that could be practically addressed. The study ultimately recommended a very large slate of infrastructure upgrades to meet demand once this "build-out potential" is reached, including the implementation of 3 rapid transit corridors (Oxford Street from Hyde Park to VMP, Dundas Street-Riverside Drive from Hyde Park to VMP, and Richmond Road-Wellington Road from Sunningdale to HWY 401, some of which were even identified to possibly support LRT), 2 freeways/expressways (VMP freeway conversion from Clark Road to HWY 401, and a new western freeway along Westdel Bourne/Woodhull Road from Oxford Street to HWY 402 or 401), and multiple suburban roadway widenings to 4 or 6 lanes. Interestingly, a northern freeway segment was not considered necessary, as future widenings along Fanshawe Park and Sunningdale were considered adequate.
Following this was the 2007 VMP Interchange Study, which appeared to be the start of implementing a portion of this plan to address future demand, using the same "build-out potential" population as the 2001 LTTC Protection Study. Worth noting as well that this study also contains a 2027 population projection, which was estimated to be 421,200 (arguably, not a bad prediction), which was already exceeded in 2021. A number of options were studied, including a 4-lane arterial and a 6-lane arterial, but the 4-lane freeway option was ultimately chosen for maximum traffic benefits. Interchanges were planned for Bradley Road, Hamilton Road, Gore Road, Trafalgar Street, Dundas Street, Oxford Street, Huron Street, and Clarke Road, all of which would be in a Diamond configuration with the exception of Bradley Road, which was designed in a Parclo AB2 configuration. Interestingly enough, however, the chosen interchange designs were only anticipated to perform at a "poor to fair" level of service.
To tie this up, it is interesting to see what has been planned juxtaposed with what has actually been built so far with around 100,000 more people in the city. The only rapid transit lines to make it into construction so far include the Wellington South BRT spur and a hybrid Dundas-Oxford West BRT spur (along with the Downtown BRT loop). Almost none of the 6-lane road widenings have occurred, with the only proper 6-lane section of road in the city being a portion of Wellington Road South. Some of the 4-lane widening has happened, predominantly in the north and west, and a small number of these projects are currently in planning (such as the Bradley Road widening/extension). Little has happened regarding any of the freeway plans either, with the exceptions of a new interchange on HWY 401 with Wonderland Road in 2014, an interchange upgrade on the VMP at HWY 401 in 2018 to provide southbound access to Wilton Grove Road, and a 2-lane extension of the VMP past Huron Street to Clarke Road in 2020. London appears to have, at the very least, protected some ROW for the VMP interchanges, as well as future widening of the new north section of the VMP, but has done nothing so far regarding the western freeway. It’ll be interesting to see how much London will build in the time it takes to reach its "build-out" population of 675,000 people, but it is likely that this number has increased significantly with changes to the Official Plan since 2001.