As students at the University, we have a great need in roaming communication in the spacious surroundings within the Chiangmai University. Therefore the transmission of the masses, it is especially important. We interested and emphasis in first the issue of mass transit. That can meet the need and satisfaction of students in much the Chiangmai University. While University students increased. And coupled with the increase in global warming and the rate of use of energy, particularly oil. It is expect that the purple car will be the eliminates the transportation issues in Chiangmai University. This paper will discuss the advantages and the disadvantages of Mass transportation at Chiangmai University.