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ALDENHOVEN, Germany — ZF Friedrichshafen unveiled its latest advances in automated driving technology for trucks, including emergency steering to avoid imminent collisions and a highway driver-assist system that automatically keeps the vehicle in the lane while maintaining safe following distances.

A yearlong federal field test of 150 Class 8 tractor­-trailers equipped with collision avoidance systems had no rear-­end crashes, a new National Highway Traffic Safety Administration study revealed.

GRAND RAPIDS, Mich. — SAF-Holland introduced new air disc brakes for trailers geared to commercial fleets in North America, with the base model at “a significantly lower price point than previous generation air disc brake systems.”

Venture Express Inc., a Tennessee-based fleet that specializes in serving the automotive industry, announced the acquisition of Chambers Leasing Systems Inc., an Ohio carrier, to expand the buyer’s services in the Midwest.

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.

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.