We took the time this last holiday weekend to make sure that the recommendations we provided on travel times on I-90 over Snoqualmie Pass were accurate. We collected traffic data and placed it on top of our predictions, which were based on historic data. Turns out we were very close. With any traffic measurement outside influences must be considered. Fortunately we experienced very mild weather conditions across the state and few traffic incidents.
We also noticed that more drivers traveled on Friday and Saturday, rather than the traditional Sunday evening rush for home. That helps keep traffic moving for everyone and we greatly appreciated those drivers who altered their schedules.
The colored thick lines on the graphs represent the estimated traffic volumes, the black lines on the graphs represent actual traffic.
On a usage note, the travel graphs for I-90 were looked at over 1,000 times a day the 20th, 21st and 22nd of November.
Thanks again to those who adjusted their trips to avoid being in and creating congestion.