Portland Press Herald
[16 states] are proposing pilots to figure out how they might charge motorists a fee for the miles they travel – rather than taxing their gas, as state and federal officials do today. Polls show mileage-based taxes are 'unwaveringly unpopular,' but transportation officials say gas tax alone can't adequately fund highway upkeep. The I-95 Corridor Coalition, which represents transportation officials from 16 states and the District of Columbia, applied for a federal grant last month to test the idea.... The federal gas tax of 18.4 cents per gallon has not been raised since 1993, and many states have not indexed their own gas taxes to inflation, so those key funding sources have fallen far behind the nation’s needs.