The serpentine approaches of the Gordie Howe Bridge are necessary because of the right-of-way available to the P3 project's designers and the ground, weakened by previous salt mining, has taken extensive remediation to ready it for not one but four projects counting the ports of entry and the new Michigan interchange.

With Q2 loss now $1.6B as of Aug. 1, Canada firm pulls out of four large shortlisted bids; CEO splits design, construction to new units, terms industry model "broken."

But developers chafe at new fees to support an added $2.1 billion in infrastructure investments.