Spokane region Interstate 90 - Dashboard
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Performance indicators for the I-90 corridor in the Spokane region
Indicators
This dashboard shows three multimodal performance indicators for Interstate 90 in the Spokane region: annual general purpose lane (GP) person miles traveled, annual GP vehicle delay, percentage of park and ride spaces occupied.
For details on methodology to calculate person miles traveled and vehicle delay, refer to WSDOT's Handbook for Corridor Capacity Evaluation (PDF 5.9 MB).
Sources: WSDOT Transportation Safety and Systems Analysis Division and WSDOT TRACFLOW (https://tracflow.wsdot.wa.gov/)
Multi-year trends
In 2021, the annual GP lane person miles traveled and vehicle delay increased over 2020 but were less than pre-pandemic levels. The second quarter of 2020 saw significantly less traffic and delay but after mid-May traffic and delay started to increase. From 2017 through 2019, the Spokane region experienced economic growth increases in employment, such as Amazon, aerospace, and energy related business, which resulted in more commuters. The region has continued to see increased residential, commercial, and industrial development. The annual GP person miles traveled increased between 2017 and 2019.
Annual highlights
In 2021, GP person miles traveled and annual delay increased compared to 2020. Nearly 260.7 million person miles traveled in the GP lanes on I-90 between Division and Argonne Road, up 12.8% from 2020 and 1.9% less than 2019. Travelers on this corridor experienced 23,000 hours of vehicle delay in 2021, about 22,000 more than in 2020 and about 50,000 less than in 2019, partly due to the five new ramp meters reducing congestion length and duration. Approximately 23.0% of available parking spaces at Park & Ride lots along this corridor were occupied in 2021, up from 5.0% in 2020.
In 2020, the statewide response to COVID-19 resulted in a significant reduction in GP person miles traveled and annual delay. Nearly 231.2 million person miles were traveled in the GP lanes on I-90 between Division Street and Argonne Road, down 13.0% from 265.7 million in 2019. Travelers on this corridor experienced 1,000 hours of vehicle delay in 2020, down 98.6% from 73,000 in 2019. Approximately 5.0% of available parking spaces at Park & Ride lots along this corridor were occupied in 2020, down from 83.7% in 2019.
In 2019, about 265.7 million person miles were traveled in the GP lanes on I-90 between Division Street and Argonne Road, up 3.5% from 256.8 million in 2018. Travelers on this corridor experienced 73,000 hours of vehicle delay in 2019, up 40.4% from 52,000 in 2018. Approximately 83.7% of available parking spaces at Park & Ride lots along this corridor were occupied in 2019, up from 74.7% in 2018.
In 2018, approximately 256.8 million person miles were traveled in the GP lanes I-90 between Division Street and Argonne Road, up 2.6% from 250.2 million in 2017. Travelers on this corridor experienced 52,000 hours of vehicle delay in 2018, up 57.6% from 33,000 in 2017. Approximately 74.7 of available parking spaces at Park & Ride lots along this corridor were occupied in 2018, down from 82.6% in 2017.
In 2017, about 250.2 million person miles were traveled in the GP lanes on I-90 between Division Street and Argonne Road, up 3.3% from 242.1 million in 2016. Travelers on this corridor experienced 33,000 hours of vehicle delay in 2017, up 37.5% from 24,000 in 2016. Approximately 82.6% of available parking spaces at Park & Ride lots along this corridor were occupied in 2017, up from 67.6% in 2016.