This dc motors can be used track traffic. Voltage : 27V Pout : 0 ... noise ,characteristics hard ,good starting ,long life ,etc .2.The motor can be designed and produced according to your reauest.3 ... .This dc motors can be used track traffic. Changzhou Xiangming Electromotor Co ... ,Changzhou,Jiangsu,ChinaTel:+86-519-88773781 | Fax:+86-519-88390358 dc motor