[YokoZar]

> I personally think that all new housing should have a state "transit expansion" tax per unit of housing it introduces, to allow the system to keep up with growth.

Why not just tax the transit use directly? That way you remove the complexity of determining which new housing is reducing traffic (by letting people commute less) and which housing is increasing traffic by how much.

[me_again]

Taxing transit use directly is called a bus ticket.

However when you provide unmetered road usage you also need to provide subsidies to persuade people to use transit, which is what transit taxes do.

[YokoZar]

There are other ways to do road pricing: odometer taxes, toll roads, even fuel taxes.