Multimodal mobility dashboard - South Puget Sound region

Region executive summary

This dashboard provides a detailed multimodal mobility analysis of the Interstate 5 (I-5) corridor between Federal Way and Olympia in the south Puget Sound region. The peak periods for the I-5 corridor in the south Puget Sound region are defined as 5 - 10 a.m. and 2 - 8 p.m.

2022 Highlights

  • In 2022, the average daily person miles traveled increased from 2021 by 3.8% due to the continued recovery of traffic volume across the state in the wake of COVID-19. Instead, vehicle delay decreased from 2021 by 26.5%, which can be attributed to the completion of construction in the Tacoma area, opening new northbound lanes and a southbound HOV lane on I-5. Public transportation has been experiencing a slow, steady recovery but remains well below the pre-pandemic level. Park and ride lots were also still below 2019 levels in most areas.
  • 1.62 million person miles were traveled on the I-5 corridor in the south Puget Sound region in 2022, up 3.8% from 1.56 million person miles in 2021
  • Vehicle delay on the I-5 corridor in the south Puget Sound region decreased 26.5% from 1.46 million hours in 2021 to 1.07 million hours in 2022
South puget sound region map image

Source: WSDOT Transportation Safety and Systems Analysis Division and WSDOT TRACFLOW (

Interstate 5

Interstate 5 is the primary commute and economic corridor connecting the central and south Puget Sound regions. WSDOT classifies the I-5 corridor between Olympia and Federal Way as a T-1 freight corridor, meaning that trucks carry more than 10 million tons of freight on this corridor annually. This corridor is served by transit buses and, between Federal Way and Tacoma, by high occupancy vehicle lanes. It is also paralleled by the Amtrak Cascades passenger rail line. Click the green bar below for more information on Interstate 5 multimodal mobility analysis.

I-5 map image
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