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LAS VEGAS — Trucking company executives gathered here at the Management Conference & Exhibition of American Trucking Associations in a time of plenty to wrestle with issues that could threaten that prosperity.

LAS VEGAS — North America's largest truck makers told fleet owners that introduction of the next generation of cleaner-burning diesel engines may not disrupt the market as much as had been feared.

Crude oil in New York closed at its fourth record high this week, closing at $53.31 on the New York Mercantile Exchange, Bloomberg News reported.

Deutsche Post Launches New DHL Mail Services • Jobless Claims Drop Despite Losses in Southeast • Michelin Recalls Passenger, Light Truck Tires

After reaching $53 in intraday trading, crude oil closed at $52.67 on the New York Mercantile Exchange Thursday, Bloomberg News reported.

Roper Industries Inc. said it signed a definitive agreement to acquire TransCore Holdings Inc. from an investor group led by KRG Capital Partners LLC for about $600 million.

Yellow Transportation Wins Chamber of Commerce Recommendation • Covenant Transport Lowers Third Quarter Expectations • Tennessee Cracks Down on Truckers' Seat Belt Use • And more...

Motorola Expands Relationship with SkyBitz • Schneider to Install Qualcomm Trailer-Tracking System • WestStart-CalStart Gets DOD Funding for Heavy-Duty Hybrid Truck • I-10 Bridge Reopens in Florida

ANAHEIM, Calif. — Trailer demand is strong but manufacturers have extended delivery times for orders because of supplier backlogs and insufficient production capacity, they said recently.

Some insurance brokers stopped writing insurance policies after several hurricanes rampaged across the southern and eastern United States, potentially hitting carriers with higher costs just after the storms caused business losses, fleet and insurance representatives said.