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Negotiations between Teamsters and a distributor for diesel engine maker Cummins Inc. continued Tuesday, two days after workers at a West Virginia facility went on strike, the Associated Press reported.

Air cargo shipments inched up 0.6% in February, the Air Transport Association said late Monday.

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The Supreme Court Monday ordered the federal government to take a new look at regulating carbon dioxide emissions from vehicles, in a rebuke to the Bush administration’s policy on global warming, the Associated Press reported.

The Institute for Supply Management’s March manufacturing index slowed and costs rose to the highest since August, ISM said Monday.

The U.S. EPA said last week that diesel engine manufacturers who want to use selective catalytic reduction to meet EPA’s 2010 emission rules must supply the urea SCR requires and prove it will be available to truck drivers using those engines.

A loosening of the tight capacity for freight hauling now makes the fuel-surcharge programs — upon which motor carriers depend to insulate them from fuel price spikes — vulnerable to demands for change by shippers.

Several parts of the Capital Beltway, Interstate 95/495 near Washington, D.C., will be closed temporarily this weekend due to scheduled work, the Maryland State Highway Administration said.