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The California Air Resources Board saw its authority to regulate truck emissions challenged in the state courts, which returned mixed verdicts for the environmental regulatory agency in 2006.

With no mechanism to provide seamless insurance coverage for trucks crossing the southwestern border, the American Insurance Association has vehemently denounced a recently issued North American Free Trade Agreement panel report regarding the entry of Mexican trucks into the United States.

In the news this morning: OPEC officials set price limit for oil export cuts; rail intermodal traffic near 1999 levels; GM to idle six plants after New Year's Day; and more to come.

Today's technology headlines: Asian electronics market wrestles with supply chain management; small movers get online with reverse auctions; suppliers, manufacturers embrace electronic supply chain systems; and more.

The Environmental Protection Agency’s new rules on diesel were met with skepticism by the trucking industry, and frustration by the refining industry.

This afternoon's headlines: Port of Vancouver looks to trucking association to settle drayer dispute; Penske Truck Leasing to buy Comcar truck leasing unit; online sales surge in November; and more.

TTNews.com will be closed Friday and Monday in observance of the Christmas holiday. Please check back on Tuesday, Dec. 26, for the latest trucking and freight transportation news.

The Clinton Administration unveiled final rules on Thursday to reduce diesel emissions from heavy-duty trucks and buses.

The National Transportation Safety Board is preparing to ask the Department of Transportation to tighten regulations on physical exams for drivers, according to the Pittsburgh Post-Gazette.

The merger of Swift Transportation and M.S. Carriers has triggered a power shift in Transplace.com, but the overall effect on the online logistics firm will be negligible, according to company officials and analysts.