An offloading controller for traffic offloading in a multi-radio-access-technology (RAT) network is described. The offloading controller includes a processor and memory in electronic communication with the processor. Instructions stored in the memory are executable to determine a channel utilization threshold based on a likelihood of packet collisions in a contention-based access network. The multi-RAT network comprises a centralized resource management network and the contention-based access network. The instructions are also executable to determine whether to offload one or more user equipments (UEs) on the contention-based access network to the centralized resource management network by comparing a current channel utilization of the contention-based access network and the channel utilization threshold.