The Shanghai Government organized a program to study the use of liquefied petroleum gas (LPG) and compressed natural gas (CNG) in other countries before using them in Shanghai. The investigation of LPG started in 1995, and by 1997 Shanghai had implemented its LPG Vehicles Promotion Program. Similarly, anticipating access to a huge source of natural gas from a pipeline running from Xingjian to Shanghai (West to East Gas Pipeline), the city started addressing the key technical problems associated with dedicated CNG vehicles, CNG bi-fuel vehicles and their engines. By 2000, 70 LPG service stations were built and around 1000 existing buses were reconstructed as LPG or CNG vehicles. The aim is to refit all public buses and taxis in the same way.

Case study courtesy of the UNEP Publication, Reducing Emissions from Private Cars: Incentive measures for behavioural change.