Posted Jun 29, 2015, 11:56 PM
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Registered User
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Join Date: Jul 2001
Location: Vancouver
Posts: 41,790
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It could just be that logistically, in order to straddle the tunnel, the tower footings (and accompanying pile-driving, etc.) need to be X distance from the tunnel so as not to destabilize it - and that accommodates 10 lanes.
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