The HÉV is a hybrid between a train and a metro, since while most of its stations are overground (outdoor), some are underground (for example, the downtown terminus, Batthyány tér).
The HÉV is a hybrid between a train. The HÉV is a hybrid between a metro. Most of its stations are overground (outdoor). Some are underground (for example). Example is the downtown terminus. The downtown terminus are Batthyány tér.