Washington State’s road usage tax ends its testing phase

The 2,000 guinea pigs who signed-up to test Washington’s road usage tax — to replace the gas tax — have finished their driving. Now it’s time to look at the data.

Those drivers logged more than 16 million miles over the last year. They tested four ways to track their miles, from low-tech (using their odometers) to high-tech (using a plug-in GPS device).

The Washington State Transportation Commission guided the testing. Executive Director Reema Griffith said they had enough drivers, across all sectors, to get really good data. There were plenty of rural area drivers too, so this wasn’t just a city experiment.