From 1983 to 1985, an investment of 40 million Hong Kong dollars for the private car's electronic toll collection system was tested, which lasted 21 months of the test, a total of 2600 vehicles and set up 18 toll stations, the use of electronic automatic toll collection system. In 1997, the Hong Kong SAR Government had commissioned the relevant research institutions to conduct a feasibility study on electronic road pricing (ERP) to explore the feasibility of implementing traffic congestion charges in Hong Kong. The Advisory Study Group has developed a set of transport research models to assess the feasibility of the strategy and consider a variety of ERP programs, put forward a series of design plans, but also conducted a field test. However, to April 2001, the cost of more than 9000 million, time-consuming research program for many years or was into the limbo. The Government announced that the average vehicle in Hong Kong will not be seriously deteriorated in the next 10 years and there will be a number of measures to improve air quality. Therefore, the scheme will not be implemented in the next 10 years. However, the Government will still pay attention to the relevant technology. Development, traffic conditions and ERP technology to prepare for the future from time to time. It is important to note that more than 90% of the public will use public transport in the daily traffic trips to the people of Hong Kong at the highest rate in the world. The Hong Kong Government has always implemented a high-fee policy on private cars, including the first registration tax, license tax, petrol tax, etc., which are high levels in the world, limiting the growth rate and utilization rate of private cars. Recently, every 1,000 people in Hong Kong have only 50 private cars, the proportion of the major cities in the world is relatively low.