# Avoid sharp turns for a truck

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

It gets complicated and risky for large trucks to maneuver around sharp turns. With Directions Flexible API users can specify the custom turn angles which are safe for their trucks to take. In order to use the `turn_angle_range` parameter, users also need to set the `avoid` property to “sharp_turn”. Let’s see how to configure such a request:

-   `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
-   `avoid` parameter set “sharp_turn”
-   `turn_angle_range` set to 110 to allow trucks to make turns between \[110,250\] degrees
-   `option` set to “flexible”

### Request

```bash
curl --location 'https://api.nextbillion.io/directions/json?origin=32.75429821,-117.14624719&destination=32.75456089,-117.14694495&mode=truck&key=<your_api_key>&avoid=sharp_turn&option=flexible&turn_angle_range=110' \
--header 'Content-Type: application/json'
```

### Response

```json
{
   "status": "Ok",
   "routes": [
       {
           "geometry": "ki|fEbc_jUU?c@???]AI?Q?w@AO?K?w@EC?A@C@??OF??[A??c@Ae@?C?w@?Y???Q?O???[?e@?Q?@_@?_@???S?IAk@??BmBdB?dDB@?fB???@hA?R?L??@z@@LBz@??@H?@??@F?@BJ@@BHFHHLvBdA??",
           "distance": 879.89,
           "duration": 149.33,
           "start_location": {
               "latitude": 32.7543,
               "longitude": -117.14626
           },
           "end_location": {
               "latitude": 32.75454,
               "longitude": -117.14694
           },
           "legs": [
               {
                   "distance": {
                       "value": 879
                   },
                   "duration": {
                       "value": 149
                   },
                   "start_location": {
                       "latitude": 32.7543,
                       "longitude": -117.14626
                   },
                   "end_location": {
                       "latitude": 32.75454,
                       "longitude": -117.14694
                   },
                   "steps": [
                       {
                           "geometry": "ki|fEbc_jUU?c@???",
                           "start_location": {
                               "latitude": 32.7543,
                               "longitude": -117.14626
                           },
                           "end_location": {
                               "latitude": 32.75459,
                               "longitude": -117.14626
                           },
                           "distance": {
                               "value": 31
                           },
                           "duration": {
                               "value": 4
                           }
                       },
                       {
                           "geometry": "ek|fEbc_jU]AI?Q?w@AO?K?w@EC?A@C@??OF??[A??c@Ae@?C?w@?Y???Q?O???[?e@?Q?",
                           "start_location": {
                               "latitude": 32.75459,
                               "longitude": -117.14626
                           },
                           "end_location": {
                               "latitude": 32.75723,
                               "longitude": -117.14625
                           },
                           "distance": {
                               "value": 298
                           },
                           "duration": {
                               "value": 51
                           }
                       },
                       {
                           "geometry": "w{|fE`c_jU@_@?_@???S?IAk@??BmB",
                           "start_location": {
                               "latitude": 32.75724,
                               "longitude": -117.14625
                           },
                           "end_location": {
                               "latitude": 32.75722,
                               "longitude": -117.14501
                           },
                           "distance": {
                               "value": 116
                           },
                           "duration": {
                               "value": 25
                           }
                       },
                       {
                           "geometry": "s{|fEh{~iUdB?dDB@?fB???",
                           "start_location": {
                               "latitude": 32.75721,
                               "longitude": -117.14501
                           },
                           "end_location": {
                               "latitude": 32.75534,
                               "longitude": -117.14503
                           },
                           "distance": {
                               "value": 208
                           },
                           "duration": {
                               "value": 30
                           }
                       },
                       {
                           "geometry": "}o|fEl{~iU@hA?R?L??@z@@LBz@??@H?@??@F?@BJ@@BHFHHLvBdA??",
                           "start_location": {
                               "latitude": 32.75535,
                               "longitude": -117.14503
                           },
                           "end_location": {
                               "latitude": 32.75453,
                               "longitude": -117.14694
                           },
                           "distance": {
                               "value": 226
                           },
                           "duration": {
                               "value": 37
                           }
                       },
                       {
                           "geometry": "{j|fEjg_jU??",
                           "start_location": {
                               "latitude": 32.75454,
                               "longitude": -117.14694
                           },
                           "end_location": {
                               "latitude": 32.75454,
                               "longitude": -117.14694
                           },
                           "distance": {
                               "value": 0
                           },
                           "duration": {
                               "value": 0
                           }
                       }
                   ]
               }
           ]
       }
   ]
}
```

Following is a visual representation of the above route on a map. We can observe that the turn at the interchange was avoided in favor of a longer route because of the “turn_angle_range” setting.

![documentation image](https://static.nextbillion.io/docs-next/docs/navigation/api/avoid-sharp-turns-for-a-truck.webp)