Once I've signed up to send materials to a great work site, (In this case plastic to a solar farm) do I need to do anything with my trade port specifically? Currently I have my plastic set to export from my trade port, and at one point my news flash said that materials being sent to the great work had stalled. Should I be doing something differently?
In order to send resources to a Great Work site, you need to set that material to "Use Locally" in your Trade Port/Depot in order for your trucks to send there. AFAIK, Export will NOT work.