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SAN DIEGO — CSA 2010, the new federal safety monitoring and rating system for motor carriers, is likely to be the most important and potentially disruptive federal policy development for trucking to come out of Washington this year, fleet executives and industry watchers said last week.

Diesel engine maker Cummins Inc. said Tuesday its profit jumped in the fourth quarter due in part to strong sales in China, India and Brazil.

Most of the Class 8 trucks sold in the United States last year by Daimler Trucks North America and Navistar Inc. were — for the first time ever — assembled in Mexico, both companies have acknowledged.

Automated vehicle tracking is now accessible to more fleets than ever before, as providers pack the technology into small — but powerful — hardware. However, economic and regulatory concerns are keeping older systems firmly entrenched in the trucking industry.

A class-action lawsuit has been filed on behalf of the 1,400 former employees of Arrow Trucking, the Tulsa, Okla., flatbed carrier that shut down abruptly last month.

Cummins Inc. said Friday it has received U.S. Environmental Protection Agency certification for its heavy-duty and midrange 2010 engines — the heavy-duty big-bore ISX15 and midrange ISB6.7, ISC8.3 and ISL9 units.

A recent study by one of the world’s largest makers of Global Positioning System navigation devices has concluded that Seattle is the most traffic-clogged city in the United States.

The Federal Motor Carrier Safety Administration said it was delaying some intermodal chassis safety requirements for six months to give operators of that equipment more time to create a database to track the condition of each chassis.

The Federal Motor Carrier Safety Administration said it was delaying some intermodal chassis safety requirements for six months to give operators of that equipment more time to create a database to track the condition of each chassis.