Techniques for modifying a data transmission overlay network are disclosed. The data transmission overlay network runs overlay network software on physical network devices to transmit data between source devices and destination devices. A system predicts network attributes associated with forwarding nodes of the overlay network in a geographic region. The system modifies the overlay network based on the predicted network attributes. Modifying the overlay network includes modifying existing forwarding nodes to increase or decrease data transmission capacity, adding forwarding nodes, and removing forwarding nodes. The system modifies the overlay network within a particular geographic region for a specified duration of time. The system reverts the overlay network within the geographic region to a pre-modified state once the duration of time elapses.