In Burlington we were very clear about what we wanted to build. We wanted to build a road system -- an electronic public road system. Cities build public roads to be available to everybody on a non-discriminatory basis.
Cities are perfectly comfortable offering a public bus service as well, or a garbage service, not to mention fire and police services. There is no problem when these services use the public roads they build, and in some cases like garbage disposal and bus service, cities actually charge a fee.