This depends on the region. In the EU some countries have such high gas taxes that the infrastructure could be entirely paid for, maintained and there would sti

This depends on the region. In the EU some countries have such high gas taxes that the infrastructure could be entirely paid for, maintained and there would still be money left. In practice that money isn't earmarked for road infrastructure though. But the end user could in theory pay for it all, so that it's not socialized to everyone. It's also possible that there are tax reductions for driving a car or tanking fuel, so it's definitely not the whole picture and this would need to be accounted for.