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Reaction to President Obama’s call for tighter carbon dioxide emissions rules for trucks poured in quickly with the first wave of comment generally offering approval, although there were also calls for caution, including from American Trucking Associations.

The adoption of natural gas as a transportation fuel continues to pick up speed. It is no surprise to me: I spent more than 30 years in the waste business and was the CEO of Republic Services, which is now the nation’s second-largest waste services provider, when the industry began to consider transitioning from diesel, a fuel we had used for decades. I understand the challenges in making the decision to switch to natural gas.

The Maryland Motor Truck Association will oppose a transportation funding plan put forth by Gov. Martin O’Malley (D) that includes a new sales tax on motor fuel and a 5-cent reduction in the gasoline tax but not in the diesel tax.

Trucking fleets wasted some $27 billion on fuel and wages as their vehicles sat in traffic jams around the country during 2011, according to a new report from Texas A&M University’s Transportation Institute.

Spurred by the demands of newer diesel engines, changing emissions technology and escalating competition, truck-stop operators say they have begun placing more fuels and other products where drivers can find them fast and buy them with a single swipe of a credit card.

While the attention of the nation was focused for much of the year on the costly and protracted presidential election campaign, trucking probably will look back on 2012 as a turning point for the adoption of natural gas as a viable alternative fuel for heavy-duty fleets.

Managers of the nation’s largest shipper-owned truck fleets are taking steps to counter the rising cost of fuel and equipment by more closely monitoring drivers and using new data collection techniques to make better routing decisions and improve compliance with safety and environmental regulations.

Truck and engine manufacturer Navistar International Corp., pressed to find a way to offer engines that comply with federal emissions regulations, said last week that it has reached an agreement to use Cummins Inc. selective catalytic reduction technology for its 13-liter engines and offer Cummins 15-liter engines in some of its International brand trucks.

Satisfaction with model-year 2011 trucks suffered as a result of technology added to comply with 2010 federal emissions regulations, which resulted in customers’ reporting more problems with the trucks, a recent J.D. Power and Associates’ survey found.