How does large-scale standardization operate under anarchism?

Hello. I'm having a bit of a conceptual struggle that may be the result of personal biases and/or a misunderstanding of the anarchist ideal. It was recommended I cross-post this from both r/Anarchism and r/Socialism_101

So, does a decentralized power structure not make it more difficult to establish necessarily large-scale projects of society (eg. infrastructure, communication networks)? Or would a more centralized management of these concerns be considered an acceptable form of hierarchy because we could democratically delegate the logistics to experts whose natural authority doesn't pose a material threat to those "under" them in the context of a classless society? Or do I not understand decentralization, perhaps? Or are we not concerned with standards on a scale of, say, international highways? Because I certainly enjoy the convenience of such standards.

I appreciate any perspectives you folks may be able to afford me.