Quote:
Originally Posted by Cypherus
I'm always for a bridge but I think a Tunnel may suffice. The image below from long ago shows such a wide span of the cable stayed bridge exceeding beyond Port Mann bridge length and tower height, along with deep pilings due to soft soil issue in the area, that it did originally look like a lofty mega project.
Image removed as it does not comply with forum citation requirements
Given the counter flow lanes on Alex Fraser currently under construction, I am conceded that a 6-8 lane tunnel for the 99 would be plenty good enough, given proper attention to seismic tolerances as well.
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A far better solution would have been to cancel the Alex Fraser counter lane project (since it will result in narrower lanes and a reduced speed limit) and to have continued with the bridge at 8 lanes.
No matter what 6 lanes is not wide enough given the fact the the rush hour counter flow already consists of 3 lanes in a single direction. 8 lanes is appropriate as it retains the current rush hour lane count and allows for two transit / HOV lanes.
Ironically if they go with a tunnel the project will end up being far more expensive than the original bridge concept.
Once again the final bids were actually well under the estimated 3.5 billion for the entire project.
We were so close to actually having an impressive modern structure welcoming people in Metro-Vancouver.
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