# Directions for custom truck sizes

_Implement Using:_ [Directions Flexible API](https://docs.nextbillion.ai/routing/directions-api#directions-flexible-api)

Routing requirements for a truck with custom dimensions can be tricky as not all roads are suitable for all types of trucks. Taking wrong and inappropriate routes can result in operational and regulatory setbacks for a business. In this example, we will generate a route that is legal for a truck with custom dimensions to take. We configure:

-   `origin` & `destination` to to denote the starting and end locations of the trip
-   `mode` set to “truck” to get a route which a car can take
-   `truck_size` parameter specifying truck dimensions using its length, width and height

### Request

```bash
curl --location 'https://api.nextbillion.io/directions/json?key=<your_api_key>&origin=36.84750172,-121.40023308&destination=36.85464131,-121.40096997&mode=truck&option=flexible&truck_size=213.36,300,413.36'
```

### Response

```json
{
   "status": "Ok",
   "routes": [
       {
           "geometry": "{w{_F~}}cVA?{CE??uEEA?mEGgBA??cBAA?gBC??iBC?bEAjAAP???F?R??A|A??EhG?d@An@??AzB@{B??@o@?c@?ADiG@}A???S?G??@Q??@kAiBC??{@?m@C??eBC??e@AA?w@AU?",
           "distance": 1497.735,
           "duration": 198.875,
           "start_location": {
               "latitude": 36.84749,
               "longitude": -121.40016
           },
           "end_location": {
               "latitude": 36.85464,
               "longitude": -121.4009
           },
           "legs": [
               {
                   "distance": {
                       "value": 949
                   },
                   "duration": {
                       "value": 120
                   },
                   "start_location": {
                       "latitude": 36.84749,
                       "longitude": -121.40016
                   },
                   "end_location": {
                       "latitude": 36.85255,
                       "longitude": -121.40444
                   },
                   "steps": [
                       {
                           "geometry": "{w{_F~}}cVA?{CE??uEEA?mEGgBA??cBAA?gBC??iBC",
                           "start_location": {
                               "latitude": 36.84749,
                               "longitude": -121.40016
                           },
                           "end_location": {
                               "latitude": 36.85248,
                               "longitude": -121.4
                           },
                           "distance": {
                               "value": 553
                           },
                           "duration": {
                               "value": 67
                           }
                       },
                       {
                           "geometry": "_w|_F~|}cV?bEAjAAP???F?R??A|A??EhG?d@An@??AzB",
                           "start_location": {
                               "latitude": 36.85248,
                               "longitude": -121.4
                           },
                           "end_location": {
                               "latitude": 36.85256,
                               "longitude": -121.40444
                           },
                           "distance": {
                               "value": 396
                           },
                           "duration": {
                               "value": 52
                           }
                       },
                       {
                           "geometry": "ow|_Fvx~cV??",
                           "start_location": {
                               "latitude": 36.85255,
                               "longitude": -121.40444
                           },
                           "end_location": {
                               "latitude": 36.85255,
                               "longitude": -121.40444
                           },
                           "distance": {
                               "value": 0
                           },
                           "duration": {
                               "value": 0
                           }
                       }
                   ]
               },
               {
                   "distance": {
                       "value": 548
                   },
                   "duration": {
                       "value": 78
                   },
                   "start_location": {
                       "latitude": 36.85255,
                       "longitude": -121.40444
                   },
                   "end_location": {
                       "latitude": 36.85464,
                       "longitude": -121.4009
                   },
                   "steps": [
                       {
                           "geometry": "ow|_Fvx~cV@{B??@o@?c@?ADiG@}A???S?G??@Q??@kA",
                           "start_location": {
                               "latitude": 36.85255,
                               "longitude": -121.40444
                           },
                           "end_location": {
                               "latitude": 36.85247,
                               "longitude": -121.40097
                           },
                           "distance": {
                               "value": 308
                           },
                           "duration": {
                               "value": 42
                           }
                       },
                       {
                           "geometry": "_w|_Fbc~cViBC??{@?m@C??eBC??e@AA?w@AU?",
                           "start_location": {
                               "latitude": 36.85248,
                               "longitude": -121.40098
                           },
                           "end_location": {
                               "latitude": 36.85464,
                               "longitude": -121.40089
                           },
                           "distance": {
                               "value": 239
                           },
                           "duration": {
                               "value": 35
                           }
                       },
                       {
                           "geometry": "od}_Frb~cV??",
                           "start_location": {
                               "latitude": 36.85464,
                               "longitude": -121.4009
                           },
                           "end_location": {
                               "latitude": 36.85464,
                               "longitude": -121.4009
                           },
                           "distance": {
                               "value": 0
                           },
                           "duration": {
                               "value": 0
                           }
                       }
                   ]
               }
           ]
       }
   ]
}
```

Following is a visual representation of the above route on a map. We can observe that a direct route is not suggested here due to the custom truck restrictions.

![documentation image](https://static.nextbillion.io/docs-next/routing/directions-api-for-custom-truck-sizes.webp)