TravelMode enum
Definisce i valori per TravelMode. I valori possibili includono: 'auto', 'camion', 'taxi', 'bus', 'van', 'moto', 'bicicletta', 'pedone'
Campi
| Bicycle | Bicicletta |
| Bus | bus |
| Car | car |
| Motorcycle | motorcycle |
| Pedestrian | Pedonale |
| Taxi | taxi |
| Truck | truck |
| Van | van |