What is the WSDOT application, how does it work?

According to the introduction of WSDOT, WSDOT is a Travel & Local app on the Android platform. There is currently a 6.2.5 version released on Mar 09, 2020, you can see the details below.

The WSDOT mobile app contains Seattle traffic and travel info for the state of Washington. Includes statewide traffic cameras, travel alerts, mountain pass reports, ferry schedules, bulletins, Vessel Watch, and northbound Canadian border wait times.