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LOUISVILLE, Ky. — The two major manufacturers of cooling units for refrigerated trailers said that they have devised new technology that will meet federal emissions mandates for small diesel engines that take effect Jan. 1, 2013.

Devices that electronically limit the top speed of trucks have “profound” safety benefits and significantly reduce speeding-related accidents, a federally sponsored study released last week found.

Amazon.com Inc. has agreed to acquire Kiva Systems Inc., a privately held maker of robotic warehouse systems, for about $775 million in cash.

The Federal Motor Carrier Safety Administration said it launched an iPhone application last week that allows users to search for and find bus companies’ safety records. The application does not display data for trucking companies, and an agency spokeswoman did not say whether FMCSA plans to eventually include those data.

Xata Corp. has introduced Xata Turnpike Multiple Management Authority, a driver tracking tool for household goods movers.

Aerofficient will begin producing a “slider” side fairing in April that it said should boost fuel savings over trailers using normal fairings.

Cellcontrol, a developer of technology aimed at preventing distracted driving, on Monday unveiled a new offering designed for trucking fleets.

LOUISVILLE, Ky. — Permanent repair kits for defective ATR-6 traction-relay brake valves are moving to truck makers, executives of Bendix Commercial Vehicle System said.

WASHINGTON — The leader of Sweden-based Volvo AB said the largest challenges in broader adoption and further development of alternative-fuel vehicles are the maturity of the technology and fueling infrastructure.