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Camera monitor systems designed to replace a truck’s conventional side mirrors are getting favor­able reviews from drivers, according to exec­utives at fleets that are testing the new technology, which also recently received a nod of approval from federal regulators.

Cummins Inc. announced its X12 engine, which weighs only 2,050 pounds, is available in Western Star 4700 straight trucks and tractors.

The New York State Department of Transportation announced that state inspectors will begin enforcing federal electronic logging device rules, ending a year-plus stretch during which a lawsuit kept the state law enforcement in limbo and left federal inspectors as the sole enforcers of the rule in the state.

Colorado moved to boost electric-car sales by taking the first step toward adopting a zero-emission-vehicle mandate patterned after one in California that’s under threat from the Trump administration.

U.S. Class 8 retail sales rose 16.7% to 26,083 in December to cap the fourth-highest sales year ever as fleets replaced older trucks and expanded amid tight capacity, strong freight demand and high rates.

WASHINGTON — Technology is changing the transportation landscape as freight carriers move toward self-driving vehicles and public officials look for new ways to develop infrastructure and prepare for what could be a major shift in traffic patterns and driving behavior.

The cost of fuel consistently ranks among the top three expenses for trucking fleets, putting fuel economy at the top of fleet managers’ minds. Increasing fuel efficiency and consequently reducing operating expenses is a major reason fleets turn to vehicle lightweighting, especially on components such as truck wheels.

LAS VEGAS — Nikola Motor Co. founder and CEO Trevor Milton said two key customers — private fleet Anheuser-Busch Cos. and truckload carrier U.S. Xpress Enterprises — will begin fleet tests of Nikola’s zero-emisssions hydrogen-electric Class 8 trucks by the end of the year, as the first shoots of the necessary fueling infrastructure are emerging in Phoenix.

Organizers for this year's gathering of the Transportation Research Board in Washington have come up with a list of a dozen topic areas that policymakers need to address to ensure a sustainable transportation network.