"Public good" is a term of art in economics which means a good is both non-excludable (it is impractical to control who benefits from it) and non-rivalrous (one person benefiting does not prevent others from also benefiting).
Roads are clearly rivalrous and while it's often impractical to prevent non-payers from entering a toll road, one can certainly record them and met penalties after the fact to discourage it.
Roads are clearly rivalrous and while it's often impractical to prevent non-payers from entering a toll road, one can certainly record them and met penalties after the fact to discourage it.
So no, roads are not a public good.