Overdrive staff | December 01, 2009

 AUG. 26-28: THE GREAT AMERICAN TRUCKING SHOW, Dallas Convention Center, Dallas, (888) 349-4287, www.truckshow.com

DOT snuffs out medical marijuana

The U.S. Department of Transportation will continue its no tolerance stand on marijuana for medical purposes or otherwise, despite new federal guidelines for prosecutors in states allowing “medical marijuana.”

Many have inquired how the Department of Justice’s new guidelines would influence the DOT’s regulated drug testing program, DOT officials said Oct. 22.

The transportation department’s Drug and Alcohol Testing Regulation, 49 CFR Part 40, at 40.151(e), does not authorize “medical marijuana” under a state law to be a valid medical explanation for a transportation employee’s positive drug test result.

— Jill Dunn

Navistar details 2010 engine changes

Engineering changes for Navistar’s 2010-certified diesel engines are minimal and include a new integrated engine brake, a more advanced single electronic control module, twin turbochargers with fixed vanes, a higher-pressure common rail fuel system and a two-stage EGR cooler.

Navistar will offer two medium-duty models, as well as heavy-duty Big Bore 11- and 13-liter engines with power ratings from 330 hp to 475 hp.

Speaking at a Navistar media event near Chicago, Ramin Younessi, vice president of product development and strategy, said work continues on the company’s 2010-compliant 15-liter diesel engine, based on Caterpillar’s discontinued C-15 diesel engine. Younessi said the engine will be available in the spring.

Younessi said the engines have completed extreme temperature and altitude testing, delivering tailpipe emissions levels of 0.04 and 0.05 NOx and fuel economy numbers “equal to or better” than comparable Navistar 2007engines.

Jim Hebe, a senior vice president, said 1,500 Big Bore engines – including 15-liter units – will be delivered early next year for customers to evaluate performance and verify the company’s exhaust gas recirculation approach to meeting 2010 emissions standards.

— Jack Roberts

Class 8 truck orders jump in October

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