In 2020, TGA and the City of Tulsa celebrated 40 years of Sister City partnerships by announcing a special dedication of the first Sister Cities Directional Sign at Tulsa Ports. The directional sign displays Tulsa’s eight international sister cities with the distance between Tulsa and each sister city in both miles and kilometers, the city emblem, and the year they became one of Tulsa’s Sister Cities. Tulsa’s Sister Cities are Amiens, France; Beihai, China; Celle, Germany; Kaohsiung, Taiwan; San Luis Potosi, Mexico; Tiberias, Israel; Utsunomiya, Japan and Zelenograd, Russia. The sign at Tulsa Ports is sponsored by Advance Research Chemicals, Inc. It is the first of several directional signs TGA plans to install throughout the city. Other major cities that have Sister City directional signs include Phoenix, Chicago, Los Angeles, Fort Worth, San Diego and San Francisco.