According to the blog Portland Transport, the proposed system detects whether a vehicle is within one of three zones and logs mileage within each zone into separate categories for billing purposes. The zones are out-of-state (no charge), in-state (nominal charge), and within the Portland metro area (nominal charge with option for congestion pricing). The mileage fee would be collected at the fuel pump in lieu of a gas tax (for those who have the proper equipment to communicate with the fuel pump), while out-of-state drivers (or those otherwise without the proper equipment) would be charged the fuel tax in lieu of a mileage fee.
Washington's neighbor to the south is often in the forefront of new initiatives--for instance, Oregon was the first state to implement a gas tax, in 1919. So how likely is the advent of such a system there?
The most recent issue of Willamette Week (in an article entitled "Miles from Nowhere") predicts that it won't happen for several reasons:
- Environmentalists question why the state would switch to a system where a Hummer owner would be treated the same as a Prius owner;
- Civil libertarians raise alarms about the mileage tax’s underlying technology that uses a global positioning system to count the number of miles driven;
- ODOT itself believes that it’s unlikely that a relatively small state like Oregon could be the first to implement a mileage tax;
- The prototypes used in the pilot are not commercially viable, meaning that the technology would have to be developed.