The TravelTime add-in for ArcGIS Pro can be installed by clicking either of the links below, related to different versions of Pro.

Launch Pro, and from the TravelTime banner in the top navigation, open the Settings box.
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The first time that you use the add-in, you will need to enter your API key details. These can be found by logging into your TravelTime account here. If you don't already have an API key, you can sign up for a free key here .

Hit OK.

You're ready to go!