Washington weighs $18 toll hike as highway costs surge 70% since 2020

Washington state officials are reviewing toll rates on two major highways after a sharp rise in revenue last year. The I-405 and SR 167 corridors saw toll income jump by 31.2% in 2025, reaching $39.9 million. Despite this increase, analysts warn that future revenue could still fall short by $10 million if no changes are made. Tolling on SR 167 and I-405 brought in $30.4 million in 2024, with an average of 6,400 weekday trips recorded. The following year, revenue climbed to $39.9 million, even though the number of weekday trips remained steady. Officials now face rising costs, as highway construction expenses have surged by 70% since 2020.

To address funding gaps, state transportation leaders are considering raising the toll rate to $18. This figure was based on earlier studies suggesting it could improve financial performance. However, even if the current $15 maximum toll is kept and other adjustments are made, a $450 million shortfall would persist. The Washington State Department of Transportation (WSDOT) plans to gather more data before deciding on rate increases or policy changes. A proposal to align tolling policies across different roadways is also under discussion. Any final decisions are expected by next winter.

The proposed $18 toll rate aims to close funding gaps caused by soaring construction costs and revenue shortfalls. If approved, the change would mark a significant shift in how Washington manages its toll roads. The state, ranked as the eighth-most regulated in the US, will review further data before implementing any adjustments.