4.With a brief introduction to history of urban tramcar and the present conditions of tramcar technology in China, the author holds that the development of modern urban tramcar shall be the trend in urban public transportation.
5.The paper gives a detailed comparison and analysis to running circumstance and characteristic of main parts of 789C Caterpillar tramcar and 730E Komatsu tramcar, which provides information for colleague on choice, employment and maintenance.
7.The collision force is simulated dynamically between the tramcar with variety stature and the car bumper (include the stiff car bumper and the elastic car bumper) which is connected with the brake.
8.With a brief introduction to the development of urban traffic in Berlin, the author makes a thoroughgoing analysis of the merits and demerits of LRT, metro and tramcar in Berlin urban traffic respectively.
