Quote:
Originally Posted by Pimpmasterdac
As far as Wonderland being an underpass it has to do with the grading. I've been to Wonderland/401 area, as it stands right now 401 is about 10 feet above where Wonderland currently ends. IMO to build an overpass that's high enough, and at least 8 lanes plus interchange in length, would require more land and money than an underpass, since the road is already below grade.
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Hmm interesting. I am aware that the 401 seems to be up a small hill where Wonderland ends but didn't know it was by that much. I always thought the underpass was due to local residents not wanting a overpass to blight their landscape (NIMBYism).
Although when the tunnel plan was shown, the interchange was downgraded to a Parclo-A2 instead of a A4. I also think the number of lanes that go through on Wonderland was reduced but I'm not sure on that one.
-The old plan saw 6 lanes on the overpass (2 for exiting loop ramps) and the tunnel is only 2 or 4 lanes wide now. Long term plans call for Wonderland to be 6 lanes to the 401 according to the city's corridor protection study.
Westminster Drive isn't part of the plan, and neither is Highbury after looking at it again. I would then assume these overpasses would be rebuilt next along with 6-laning the 401 from Highway 402 to 4. (That would also involve replacing the Tempo Road bridge.)
-So pretty much every 401 overpass in London will be worked on during the next few years except the 402 flyover, Digman and Wellington (which was recently rebuilt).
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