$20 million of State collected Gas Tax goes to the General Fund which funds "Public Works."
Public Works' overall budget is $125M including $19M in street maintenance. So, while it is true that $20M from the usage tax for Autos goes for road maintenance it also means roughly $100M of the Public Works budget comes from bonds, and people (including cyclists) who pay sales tax, income tax, and property tax. Public Works includes "Transportation and Mobility" the city's multi-modal transportation systems and off-street parking assets. I still think it is unfair to claim that cyclists don't contribute to the facilities they use. Therefore trying to justify bicycle usage fees based on cyclists not already paying is wrong, IMO.