SALEM, OR -- A pilot project in Oregon, that would replace the gas tax with a device drivers plug into a vehicle, is nearly a year old.

Michelle Godfrey, with OreGo, says around a thousand vehicles are taking part, and the retention rate is currently 95%. "Given that a lot of them are actually paying a little bit into the system, that’s a pretty good retention rate." She says there were some minor technical issues that have since been resolved.

The OreGo device monitors the miles driven and the gas tax paid at the pump. High mile vehicles pay more, low mileage vehicles get money back. Other states are also testing the devices, but Oregon is the only one actually connecting the technology to payments.

The results of the pilot project will go to Legislators to determine whether the gas tax will be abolished in exchange for outfitting all vehicles with the devices.