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Retail diesel prices will peak this month before beginning a slow decline through the end of the year, the Energy Department said Tuesday.

A proposed California Air Resources Board regulation would force the owners of an estimated 80,000 trucks built before 1994 to remove them from the state’s roads by 2009, a trucking official said.

California regulators proposed new emissions rules for the state’s ports and the trucking industry, designed to begin compliance with ambitious “greenhouse gas” emissions reduction law, the Contra Costa Times reported Friday.

Air and ocean freight forwarder UTi Worldwide said Thursday its fiscal second-quarter net income fell 20% to $27.7 million or 28 cents a share, from $34.5 million or 35 cents a year ago.

Fleets can save fuel — possibly by as much as 5% — by “overspec’ing” engines, according to PHH FirstFleet, an asset, financial and technology management company for fleets.

Federal officials next month are set to unveil a requirement that automakers install side air bags by the early part of the next decade, the Detroit News reported.