Northfield / 85 Exchange upgrades?

[mpd618]

Loss of lanes?  What lanes are lost?  It was four lanes, two each direction before, I believe it is the same after.  

Is it though? Northfield was four lanes before. There are now two sets of rails running down the centre, sidewalks on both sides (only one side had a sidewalk before), and I believe bike lanes were in the plan as well. How can four lanes of traffic also be maintained without widening the bridge?

I think that and more is answered in this report. The short answer is by eliminating the turning lanes that were there before. (See Street View.)