he Washington State Department of Transportation now provides real-time toll rates for the I-405 express toll lanes as a publicly available
The Washington State Department of Transportation now provides real-time toll rates for the I-405 express toll lanes as a publicly available live data stream for software developers. The API is publicly available here: http://wsdot.wa.gov/traffic/api/ , along with several other live data streams including traffic flow, travel times, and highway cameras.
We would love to see this data integrated into the Waze app to help drivers make more informed choices about their route options.
The I-405 express toll lanes let drivers choose a more reliable trip by paying a toll on weekdays from 5 a.m. to 7 p.m. Toll rates adjust depending on real-time traffic conditions and update every 5 minutes. Carpools with the right number of occupants (depending on time of day) can use the express toll lanes for free with a Flex Pass.

Thank you for your suggestion! As you may know, Waze calculates and displays toll prices in many parts of the world. To know when this becomes available in your country, stay tuned on Waze’s social pages on Facebook and Instagram
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MW commented
I live in the Seattle / Tacoma metro area too! I use SR167 and I would like to be able to report to other Wazers how much the variable toll costs at different points of my commute. The SR167 express lane tolls are variable based on day of week, time of day, location of where you enter / exit.