Enviros testifying before PDX City Council yesterday kept referring to the CRC Bridge as being 12 lanes across the river. With ingress and egress lanes BEFORE the bridge that’s true in some cases but not OVER THE BRIDGE. Planners are talking about only 3 or at best 4 lanes (on only one side) for actual car traffic.
Why do they persist in lying about the the 12 lanes, then? Because it sounds worse to the enviros around here who listen only to the disinformation being spread by these groups.
From the CRC website:

The replacement bridge option calls for new structures that:

• Have three through-travel lanes and two or three auxiliary lanes for entering and exiting the highway
• Have dedicated lanes for high capacity transit and pedestrians
  and bicycles
• Provide sufficient clearance for marine traffic and avoid Pearson Field airspace
• Are built immediately west (downstream) of the current I-5 bridges

Those auxiliary lanes wouldn’t be needed to exit the bridge over the water–get it?