The Washington State Transportation Commission (Commission) has spent more than a decade studying options to help keep transportation funding fair and sustainable as gas tax revenues decline. You have come to the right place to learn about findings, research results, and next steps.

CURRENT RESEARCH SPOTLIGHT

With support from federal funding, a new research effort called Sustainable Transportation Revenues: Equitable, Efficient, and Transparent (STREET) is now underway.

This project focuses on working with the states of Hawaiʻi, Montana, Nevada, Oregon, and Utah to explore new ways to fund transportation, including a road usage charge (RUC). The research will take place over the next three years (2025-2028).

Some highlights of the STREET project include:

  • Testing new funding ideas: A multi-state pilot that lets the public experience and share feedback on alternatives to the gas tax
  • Assessing how heavier vehicles can help fund roads: An analysis to better understand revenue trends and impacts beyond our everyday passenger vehicles
  • Enabling seamless RUC programs: Developing shared standards so RUC programs can work consistently across state borders
  • Planning for the future: A practical roadmap to help motor vehicle agencies implement new funding approaches
Stay tuned for more information on the current phase of research in summer 2026.

GAS TAX

For over a century, Washington drivers have helped fund roads and bridges through a gas tax, whenever they fill up at the pump.

Gas tax illustration
Sustainable transportation illustration

SUSTAINABLE TRANSPORTATION

As cars become more fuel efficient and drivers pay less gas tax, we need a new way to fund our roads.

ROAD USAGE CHARGE (RUC)

That's where a pay-per-mile road usage charge comes in.

Road usage charge illustration

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A Road Usage Charge is:

  • A per-mile charge based on the number of miles driven (not gallons of gas purchased)
  • Not in addition to the gas tax – drivers will get a credit for gas taxes paid which can be used to pay their RUC charges
  • A reliable source of funding that doesn't rely on consuming fossil fuels
  • A fair way to pay in which everyone contributes based on what they use

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What does RUC mean for Washington drivers?

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KEY RUC CONSIDERATIONS

As Washington prepares for a future RUC system to fund transportation, these three priorities must be addressed:

Privacy Protection

Offer drivers choice in reporting miles driven and enact strong protections on access to and usage of miles driven data in law

Equity

Ensure all drivers pay for miles driven, regardless of what kind of car they drive

Harmonize Climate Goals

Reduce reliance on fossil fuels as the state transitions to zero-emission vehicles