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Engine makers are providing customers a gauge to help them determine how dependable and durable an engine is supposed to be, called a B-life rating. It’s regarded as the industry standard for measuring the life expectancy of an engine, but the figures are sometimes misunderstood.

Sales of active safety systems are rising and, as of next summer, the first versions will become mandatory on new U.S. heavy-duty tractors. Two of the largest suppliers to truck makers keep making the systems more capable, but no matter how sophisticated they get, they all start with anti-lock brakes.

Continental Tire said it is researching using dandelion natural rubber as a polymer and “key component” of future tires.

The price of a used Class 8 truck sold in April fell compared with a year earlier, but inventories stabilized after rising for the past year, analysts said.

Knorr-Bremse Group, a global manufacturer of braking systems and parent company of Bendix Commercial Vehicle Systems, has agreed to acquire a steering technology company that will expand its capabilities in the field of autonomous driving in commercial vehicles.

WASHINGTON — Fred Smith, founder and chairman of FedEx Corp., said he believes nationwide use of 33-foot twin trailers can gain approval during the next presidential administration.

Commercial vehicle component supplier Accuride Corp. said its Brillion Iron Works business unit won a long-term contract to supply the flywheel used with the Detroit DT12 automated manual transmission.