> Public roads are supposed to be paid for through fuel taxes,
No, they aren't, at least in California; fuel excise taxes (and diesel, but not gasoline, sales tax) are a part of road funding, but other sources, including general revenue (largely, sales taxes and personal and corporate income tax), are used.
EDIT: Not that taxing ride-sharing is likely to reduce congestion. It plausibly could increase it, if it induces residents of mostly walkable communities (which, sure, LA has fewer of than it should) who might otherwise rely on ride-sharing for occasional car needs to instead keep a personal vehicle, which then tends to encourage additional, less-necessary driving.
No, they aren't, at least in California; fuel excise taxes (and diesel, but not gasoline, sales tax) are a part of road funding, but other sources, including general revenue (largely, sales taxes and personal and corporate income tax), are used.
EDIT: Not that taxing ride-sharing is likely to reduce congestion. It plausibly could increase it, if it induces residents of mostly walkable communities (which, sure, LA has fewer of than it should) who might otherwise rely on ride-sharing for occasional car needs to instead keep a personal vehicle, which then tends to encourage additional, less-necessary driving.