> For the complete documentation index, see [llms.txt](https://docs.novacura.com/flow-connect/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.novacura.com/flow-connect/reference/reference/designer/queue-lane.md).

# Queue lane

The Queue lane is designed for apps that need offline capabilities or asynchronous item processing. It separates machine steps, which handle system updates and data transfers, from the Main lane, where all user interactions take place. This separation ensures that items are processed reliably, even without an active network connection, allowing apps to run smoothly regardless of online availability.

In Connect, apps can include two types of lanes:

* Main lane – the default lane for user steps and all end-user interactions.
* Queue lane – an optional lane added when needed, such as for apps intended to run offline. It handles machine steps that manage and upload items asynchronously. Queue lanes can only be added to apps, not to individual components. 
  * A queue lane is added by clicking the + icon located at the top or bottom left of the design area.

**Lane crossing**

When a lane crossing occurs, an item is created. By clicking the spanner icon located between the lanes, the designer can add text that will be visualized to the end user in Sync Work for each item.

Read more about  Sync Work [here](/flow-connect/reference/reference/clients/my-data.md#sync-work).

Find an example of how to create an offline app [here](/flow-connect/reference/how-to-guides/offline-create-and-run-an-app.md).


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