[contubernio]

They depend on public investment to build and support road infrastructure. If one accepts your point of view, these companies depend on massive government subsidies. Or perhaps they should pay for the construction and upkeep of the roads their vehicles use.

[jlebar]

All companies (and indeed individuals) rely on and benefit from various public goods, such as roads, law and order, and an educated populace. They pay for these public goods through taxes.

https://en.wikipedia.org/wiki/Public_good

[robotresearcher]

These robot vehicles pay road use taxes, like other vehicles do. And when used commercially, they pay taxi tariffs. There's even an EV-specific road tariff in CA to make up for the lack of gasoline tax revenue.

I'm not sure why you would assume to the contrary.