TDI Transportation Displays International Ltd, which was established in June 1981, is fully owned by SHAC. It acts as an advertising space agent for poster sites and display panels in main transport systems. The company has major advertising contracts for display advertising on all KCR and LRT passenger trains and stations, and on Star Ferry approaches on Hong Kong and Kowloon sides of the harbour. TDI secured the advertising contract for the Hong Kong-Guangzhou through-train 11 years ago and has been able to maintain full use ever since. Besides its advertising concessions, TDI also tries to develop new advertising media. TDI was the first agent for taxi-roof advertising panels. This year, TDI has initiated new advertising concepts by installing spoiler-style advertising displays on the backs of taxis and developing bus shelter advertising for all KMB bus stations. Through these and other options, TDI is helping to offer advertisers a wide range of opportunities.