<p>Scour formed around bridge piers represent one of the most important issues in bridge hydraulics. This study examined the impact of transverse waves on local scour around bridge piers in the resonance mode. Sedimentary experiments were conducted in clear water. The findings showed that the highest scour depth in the wave-based scenarios increased on average by 40%, 49%, and 20% in wave modes I, II, and III compared to the wave-free scenarios. The data also showed that the highest scour depth was directly related to the wave mode. Accordingly, as the wave number increased, the highest scour depth also increased. The transverse waves formed in the experiments conducted in the wave-based scenarios affected the scour pattern. Accordingly, the highest scour depth varied in terms of the wave node in wave mode I, and as the transverse distance between the piers increased, the highest scour depth was found to be closer to the location of the wave node. However, in wave modes II and III, the highest scour depth was entirely affected by the wave node location, and occurred at the location of the wave node.</p>