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Truck engine makers planning to use selective catalytic reduction in 2010 engines lashed out last week against what one executive called “unsubstantiated attacks leveled against SCR” by the one manufacturer that plans to use only exhaust gas recirculation to cut emissions of smog-forming nitrogen oxides.

ARLINGTON, Va. — Congressional leaders from both parties last week defended Transportation Secretary Ray LaHood after a spokesman for President Obama rebuffed LaHood’s suggestion that the government might use a vehicle miles-traveled tax to finance highways.

President Obama called on Congress to approve legislation creating a cap-and-trade system aimed at reducing carbon emissions. Obama spoke on Feb. 24 to Congress in a joint session and invited spectators, who included the chairman of American Trucking Associations.

The number of Class 8 trucks operating in the United States increased by 60,000 at the end of the fourth quarter from a year earlier, reversing the first-ever decline of 17,000 that research firm R.L. Polk & Co. reported at the end of the third quarter.

WASHINGTON — American Trucking Associations members gathered here last week to build support within Congress and the Obama administration on issues ranging from highway financing to potential union-organizing legislation.

WASHINGTON — Transportation Secretary Ray LaHood said federal officials should explore all options to finance infrastructure, but he later strongly rejected a fuel tax increase, at least while the economy is in recession.

American Trucking Associations said Thursday it was unveiling a new trailer for use in its image and outreach programs.

Congress should focus on better freight mobility as a national goal, a trucking official told a congressional hearing held in Los Angeles Friday.

ORLANDO, Fla. — An empty booth at the Technology & Maintenance Council’s 2009 Transportation Technology Exhibition marked the spot where auxiliary power manufacturer Rigmaster Power Corp. was to display its wares.

ORLANDO, Fla. — New products shown at the Technical & Maintenance Council’s recent meeting here ranged from a high-tech flatbed trailer to a low-tech mud flap, along with a seat and sleeping pad that combine New Age philosophy with Texas Instruments engineering.