From its golden age as a prosperous business hub, Thanon Thahan's role gradually began to change with the accelerating advancements in transportation. The construction of the Seri Prachathipatai Bridge across the Mun River, connecting Warin Chamrap District to Ubon Ratchathani city, began in 1953 (B.E. 2496) and officially opened in 1954 (B.E. 2497).