API Documentation

The REST API provides simple interfaces to most of the data available on the 511WI website. The REST API enables developers to access essential data on the 511WI website including Cameras, Message Signs, Truck Parking, Winter Road Conditions, Events, Notifications, Travel Times. This API enables developers to create mobile traffic apps for Wisconsin.

Notes:
  • Requires a developer key. For most calls, query string 'key' parameter is required.
  • Throttling is enabled. Ten calls every 60 seconds.
Developer API Key
A registered account is needed before you can sign up for a Developer API key. For new users, sign up for an account; otherwise log in and then you can request for an API key here. The Developer API key info will display here as well.

The following outlines the resources available via the 511WI API.

API Documentation
ResourceDescription
Cameras

Returns all cameras.
Message Signs

Returns all VMS.
Truck Parking

Returns all truck parking.
Winter Road Conditions

Returns current road conditions.
Events

Returns all traffic events.
Notifications

Returns all advisory notifications.
Travel Times

Returns all travel times.

WZDx

The Work Zone Data Exchange (WZDx) Specification enables infrastructure owners and operators (IOOs) to make harmonized work zone data available for third-party use. The intent is to make travel on public roads safer and more efficient through ubiquitous access to data on work zone activity, and WZDx was developed to improve access to work zone data was one of the top needs identified through the US Department of Transportation (USDOT) Data for Automated Vehicle Integration (DAVI) effort.

Visit the WZDx Specification for more API documentation.

Access the WZDx API: https://511wi.gov/api/wzdx