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XRS Corp. said it has started selling the NXT, a mobile trucking telematics tablet that uses the company’s software, a tablet from Samsung Telecommunications America and Verizon Wireless’ 4G data network.

DETROIT — Daimler Trucks North America announced a pair of significant expansions in its telematics offerings here, unveiling the first factory-installed computer tablet for its trucks and a new communications package to seamlessly provide services over that tablet.

An hours-of-service waiting time exemption for drivers of “specially constructed” oil-field operations trucks should be extended to include such other oil and gas operations trucks such as those that deliver sand and water, several motor carriers and trade association officials told federal regulators.

The Federal Motor Carrier Safety Administration has pushed back the deadline for public comment about changes to the hours-of-service rules for oilfield haulers.

Heavy-duty truck manufacturers have improved the fuel efficiency of their tractors through a combination of new technologies, powertrain improvements, enhanced aerodynamics and efforts to reduce rolling resistance.

New engine technologies and improved aerodynamics have yielded significant fuel efficiency gains for carriers running post-2010 heavy-duty trucks, but some fleet executives said they are encountering some new maintenance issues.

WebTech Wireless, a supplier of GPS location-based and fleet telematics services, reported a loss of C$3.55 million for the fiscal quarter ended Dec. 31, compared with a loss of C$7.26 million a year earlier.

Telematics provider inthinc Technology Solutions Inc. said it launched a Web-based portal for its driver performance-rating product.