Pesently the trend is to use DC motor for hybrid bus vehicle. IIT Delhi has recently completed the project of developing Eicher motors India 18 seater bus with DC motor(30 kW). Now they are going ahead with 90kW D C motor to be used in bus developed by Tata Engineering & Locomotive Ltd., Pune, India.
There is a bus running is IIT-Delhi where in BLDC motor is used. You can contact Prof. Arockiasamy of IIT Delhi for further information.