The reason that the Department of Transportation chose to first install GPS systems in the MRT shuttle buses is that these buses do not run often, making waits long. Moreover, when passengers emerge from an MRT station having just taken a precisely scheduled transit train, they won't feel the disparity in service so acutely if they can access "smart" shuttle buses.
交通局之所以選擇捷運接駁公車優先建置定位系統，原因在於接駁公車發車密度低、等候時間長，尤其當乘客由發車時間精準的捷運站出來後，若能轉搭智慧型接駁公車，才不致感覺落差太大。