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Interpool Inc., a maker of shipping containers and chassis for intermodal container transportation, reported its 2006 net income rose, in part due to the sale of its container operating lease fleet.

Average U.S. retail gasoline prices jumped 20 cents in the past two weeks to $2.55 a gallon, according to the latest Lundberg Survey of filling stations released Sunday.

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Cascade Sierra Solutions, a nonprofit group that promotes the sale of products to help truck drivers save fuel and reduce emissions, said it has opened the first of what could be as many as eight “green truck technology” showrooms along the Interstate 5 corridor in Oregon, Washington and California.

The Environmental Protection Agency has proposed for the first time sharp cuts in exhaust emissions from railroad locomotive and marine engines in a plan a spokesman said would “follow exactly the same pattern” as environmental regulations for truck engines.

Canada-based transportation firm Trimac Income Fund earned C$3.1 million or 8 cents per unit in the fourth quarter, down from C$5.7 million or 13 cents a year earlier.

The number of heavy-duty trucks in use in the United States increased 5.2% to 3.51 million Class 8 commercial vehicles last year, as fleet owners stocked up on new trucks and kept more old vehicles in service, market research firm R.L. Polk & Co. said.

The Department of Transportation issued a reminder that starting in 2007, daylight-saving time will begin three weeks earlier, starting this weekend.

Diesel engine maker Cummins Inc. said Thursday that its board declared a two-for-one split of the company’s stock, to be payable on April 9 to shareholders of record as of March 26.

DHL Worldwide Express plans to focus on expanding overseas shipments from the United States after investing in a domestic package delivery network, Bloomberg reported.