---
title: "Update an existing driver-trailer assignment."
method: PATCH
path: "/driver-trailer-assignments"
tags: ["Driver-Trailer Assignments"]
---

# Update an existing driver-trailer assignment.

`PATCH /driver-trailer-assignments`

## Request

- Base URL: `https://api.samsara.com`
- URL: `https://api.samsara.com/driver-trailer-assignments`
- Auth: HTTP bearer

Update an existing driver-trailer assignment.

 <b>Rate limit:</b> 5 requests/sec (learn more about rate limits <a href="https://developers.samsara.com/docs/rate-limits" target="_blank">here</a>).

To use this endpoint, select **Write Assignments** under the Assignments category when creating or editing an API token. <a href="https://developers.samsara.com/docs/authentication#scopes-for-api-tokens" target="_blank">Learn More.</a>
 

 **Submit Feedback**: Likes, dislikes, and API feature requests should be filed as feedback in our <a href="https://forms.gle/zkD4NCH7HjKb7mm69" target="_blank">API feedback form</a>. If you encountered an issue or noticed inaccuracies in the API documentation, please <a href="https://www.samsara.com/help" target="_blank">submit a case</a> to our support team.

## Query parameters

- `id` string, required

## Request body

- TrailerAssignmentsUpdateDriverTrailerAssignmentRequestBody: Update a new driver-trailer assignment
  - `endTime` string, required: The end time in RFC 3339 format. The end time should not be in the future

## Response `200`

OK response.

- TrailerAssignmentsUpdateDriverTrailerAssignmentResponseBody
  - `data` PatchDriverTrailerAssignmentsResponseBodyResponseBody, required: Response after successfully updating a Driver Trailer Assignment
    - `createdAtTime` string: Time when the driver trailer assignment was created, in RFC 3339 format
    - `driverId` string, required: Samsara ID for the driver that this assignment is for.
    - `endTime` string, required: Time when the driver trailer assignment ends, in RFC 3339 format
    - `id` string, required: Samsara ID for the assignment.
    - `startTime` string, required: Time when the driver trailer assignment starts, in RFC 3339 format
    - `trailerId` string, required: Samsara ID of the trailer
    - `updatedAtTime` string: Time when the driver trailer assignment was last updated, in RFC 3339 format

## Other responses

- `401`: Unauthorized response.
- `404`: Not Found response.
- `405`: Method Not Allowed response.
- `413`: Content Too Large response.
- `429`: Too Many Requests response.
- `500`: Internal Server Error response.
- `501`: Not Implemented response.
- `502`: Bad Gateway response.
- `503`: Service Unavailable response.
- `504`: Gateway Timeout response.
- `default`: Bad Request response.

---

[API](https://skmtc.dev/samsara/apis/samsara-api.md) - [All operations](https://skmtc.dev/samsara/apis/samsara-api/llms.txt) - [OpenAPI document](https://skmtc.dev/samsara/apis/samsara-api/revisions/a9e35d4999be?raw)