Waiting on truck emissions mandates

With help from Esther Whieldon

WAITING ON TRUCK EMISSIONS MANDATES: When it comes to federal rules, the final standards expected this week for heavy-duty trucks are a big deal. Any day now, the Obama administration is set to roll out its rule stipulating what kind of gas mileage heavy-duty trucks must get and how much pollution they can spew. And the administration estimates those new benchmarks will cut emissions by 1 billion metric tons and decrease oil use by 1.8 billion barrels.