In theory, advocates of an infusion of spending to fix the nation's crumbling roads and bridges have found the perfect political moment.
Fuel prices are plunging to their lowest level in years. The Highway Trust Fund is broke, and Congress faces a spring deadline to replenish it. The obvious answer--the only answer, according to many in Washington--is to raise the 18.4 cent-per-gallon gas tax, which hasn't gone up in more than 20 years. Since prices at the pump have dropped more than a dollar per gallon in some areas, drivers would barely notice the extra nickel they'd be forced to initially pay as a result of the tax hike. That wasn't true until recently: For years, the pocketbook punch of the Great Recession combined with gas prices that peaked above $4 made an increase both politically and economically untenable.
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