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, special lanes and special road for exclusive use of public transport system are set up. In Nagoya, Japan, special public bus lanes are set along the road central division line so as to ensure the speed of ground public transport. Furthermore, the city is planning to construct elevated public transport roads in the city area so that the speed of ground public buses could be increased to 20km/h from 10km/h. III. The Application of Metrobus System in Curitiba in Brazil The Metrobus system is based on the public transport system in Curitiba, a famous clean city in the world. On the one hand, it has the features of large-capacity track transport system, special road fights, horizontal embarking and disembarking and ticketing outside the'' bus. On the other hand, it also has the flexible characteristics of the conventional public transport system and borrows the advanced information management technologies. By fully demonstrating the principle of priority for the public transport system, it is a new and highly efficient mode of public transport solution with low cost, short construction period, fast speed and high punctuality. It is also nicknamed "ground subway" due to its large capacity. 1. Brief introduction of the application of the Metrobus system in Curitiba in Brazil Curitiba, located in southern Brazil, has a population of more than 1.5 million. The car possession rate is very high (300 cars per 1,000 residents). The transport for such a large number of cars requires building of several fast roads in the city. This will naturally cause more serious pollution, traffic congestion and traffic accidents. Therefore, the city hoped to develop a modem, high-grade and low cost transport system with a large capacity. It initially planned to develop a light-track transport system, but it was too costly for this city. Therefore, the land reserved for the light-track transport system was used to construct special bus roads. The layout of the special bus road system was closely in line with the overall development plan of the city. All densely populated residential areas and commercial districts were developed at places near the public transport system, and were also developed along the special bus roads. In order to better tap the high-capacity transport system, designers and planners paid special attention to the public bus stops (crystal tube-shaped plastic bus stops), which were constructed at the same height of the bottom of public bus (800mm to the ground). Passengers could access the stops through stairs or ladders. As in the subway system, passengers could buy tickets first at the platforms, and then could make transits within the transport system without buying extra tickets. In addition, in order to reduce the stop time, the leaning passage from public bus could be extended to the platform when the bus stops, so that passengers could embark or disembark as quickly as they do from subway train. With constant improvement and refinement, Curitiba finally developed