The Obama administration has floated a transportation authorization bill that would require the study and implementation of a plan to tax automobile drivers based on how many miles they drive.

The plan is a part of the administration’s “Transportation Opportunities Act,” an undated draft of which was obtained this week by Transportation Weekly.

This follows a March Congressional Budget Office report that supported the idea of taxing drivers based on miles driven.

Among other things, CBO suggested that a vehicle miles traveled (VMT) tax could be tracked by installing electronic equipment on each car to determine how many miles were driven; payment could take place electronically at filling stations.