Tolls on Interstate 5 only are missing a serious point. People will get around those tolls by using Highway 14, Highway 500, and Padden Parkway to I-205, where they can drive toll-free into Oregon. That will double if not triple the traffic on I-205 and create a very serious and dangerous situation. I would suspect toll revenue will not meet projections even if the toll was dropped to 10 cents, unless they add tolls for the Glenn Jackson Bridge, as well, or add tolling to the onramps to said highways.
Common sense seems to evade the planners. Tolling only one crossing is much like just wearing a shirt; something is uncovered and causing a sensation.