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December 15, 2000 9:30 AM, EST

California adopted diesel engine regulations for 2005 and 2006, effectively closing an unregulated gap and creating an environmental “law of the land” for truck makers.

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The state’s Air Resources Board has mandated that engine makers produce engines in the 2005-2006 time frame that are as clean as what federal regulations require for 2002-2004.

Thirteen other states are expected to follow suit next year. If that happens, those states would wield the right to oversee 40% of the new truck market.

Because no federal diesel engine regulations exist for 2005-2006, the California Air Resources Board felt it had to take action, according to a board spokesman. (11-27, p.1) Engines produced for sale in that state in 2005-2006 cannot emit more than 2.0 grams of nitrogen oxides per brake, per horsepower diesels during this unregulated period until EPA’s 2007 engine standards take effect.

For the full story, see the Dec. 18 print edition of Transport Topics. .