The transverse energy fluxes (both instantaneous and averaged) arising under the superposition of two quasi-plane waves are considered in this paper. The case of superposition when the frequencies of the interacting beams are different is analyzed. The cases of superposition of coaxial orthogonally (linearly and circularly) polarized waves are considered. The mechanisms of forming the distribution of characteristics of the resulting averaged transverse component of the Poynting vector are established. The data of computer simulation are presented.