How I built a toll rate visualizer for Washington highways

»> go to watolls «< I live in Washington State. Whenever I am rushing to get to a meeting or needing to get somewhere fast, I sometimes take toll roads to get there faster. As I took them more, I noticed that I didn’t know what time to take them to get to my destination with the minimum payment possible. Some mornings I would leave at 8 and pay more than if I left at 7 for the same stretch of road.