You can certainly display a text value. For example, the following post is using the Google Traffic API to do exactly that:
There were a lot of other requests included in the post though: displaying different routes based on which route is faster, changing the color based on the route, hiding it at different times, etc. 
That logic would need to run somewhere and render the appropriate output. In theory, it could even be done with a custom groovy ‘app’ on your Hubitat hub, but would require some programming.
For example, here’s a case where a user is using an external app to parse a result from an API and then render a relevant image: