I don't think people are being unreasonable by being unhappy with a $40 toll. The way the article words it, solo drivers all of a sudden saw a $40 toll where they previously had no permission to drive at all. What actually happened was that people were expecting to see a $6 toll be put in place and instead saw a $40. Imagine going to McDonald's where your friend told you that you could get a Filet o' Fish for $1 but…
People understood the clear division that existed prior to tolling - the separate lanes were for commuters that had a lower environmental and traffic impact, and people that had to catch a flight. A price tag reframes the problem in terms of access to a paid service... and everyone expects to be able to afford access to public infrastructure.