# Asset Tracking

![Asset Tracking](https://docs.sitetrax.io/uploads/images/gallery/2026-09/st-intel-asset-tracking-feature.png)

Following a single piece of equipment across time and sites using the observations SiteTrax.io has captured.

## What tracking means here

SiteTrax.io is an observation-based record, not a telematics feed. It tells you where and when a unit was seen by capture you control. Between observations there is no position, and that is a property of the method rather than a gap to be filled in.

Understood that way it is well suited to intermodal and yard work, where the questions are usually when did it arrive, when did it leave, and is it still here.

## In the application

1. Open **Assets** and search the complete identifier.
2. Widen the date range until the history you need is covered.
3. Read the sequence of records: each gives a time, a project, a direction and an image.

## Supported identifiers

Depending on your configuration, SiteTrax.io can read intermodal container IDs, chassis IDs, trailer IDs, USDOT numbers, and license plate information where the configured solution supports it, along with other configured outputs.

## From an assistant

> Using SiteTrax.io, give me the observation history for chassis identifier ABCZ123456 across all my sites this quarter.

## Watch out for

- **Use the complete identifier.** Partial identifiers do not match.
- **A USDOT number identifies a carrier**, not a specific tractor, so it will not behave like a unique asset ID.
- **Two records can describe one pass.** Vertical and horizontal reads of the same unit, or paired container and chassis processing, can both produce more than one row.
- **Cross-site history needs shared projects.** Sites not shared with your account will not appear.