In LA a majority of voters elected to raise sales taxes several times to improve transit, despite only like 20% of commuters using it city wide (transit use is extremely high in certain neighborhoods like Westlake, though). LA metro is considering slashing fares because they make up something like 5% of the operating budget, thanks to these sales tax measures and federal grants. It's not just LA metro that is funded like this, cleveland RTA is also funded by a portion of sales tax revenues.