API Documentation
The REST API provides simple interfaces to most of the data available on the CT roads website. The REST API enables developers to access essential data on the CT roads website including Message Signs, Events, Advisories. This API enables developers to create mobile traffic apps for Connecticut.
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 CT roads API.
| Resource | Description |
|---|---|
| Message Signs |
Returns all VMS. |
| Events |
Returns all traffic events. |
| Advisories |
Returns all advisories. |