def vehicle_map(veh):
    """Maps a vehicle type id to a name
    :param veh: vehicle type id
    :return: vehicle type name
    """
    if veh == 2:
        return "Tram"
    elif veh == 6:
        return "Metro"
    elif veh == 7:
        return "Ferry"
    elif veh == 12:
        return "Train"
    else:
        return "Bus"