California environmental regulators have approved a slate of amendments to fine-tune the state’s transport refrigerated unit rule, but denied a request by industry stakeholders to push back compliance deadlines by extending the useful life of the units from seven to nine years.

The Environmental Protection Agency has filed a motion to dismiss a federal lawsuit filed by Navistar Inc., rejecting the engine maker’s claims that the agency must test selective catalytic reduction technology engines with the SCR system turned off, running without diesel exhaust fluid, and running with water instead of diesel exhaust fluid.

The Truck Renting and Leasing Association has asked federal regulators to postpone the elimination of “registrant-only” Department of Transportation numbers that are given to the owners of commercial vehicles who are not motor carriers.

The National Transportation Safety Board Tuesday issued a slate of regulatory recommendations aimed at reducing the number of cargo tank truck rollovers.

The Federal Motor Carrier Safety Administration has asked its advisory committee to examine concerns about the Compliance, Safety, Accountability program’s roadside violation severity weightings.

An anti-fraud bill introduced in the House would raise the freight broker surety requirement to $100,000 and require separate broker and carrier licenses.

A Buffalo, N.Y.-based Federal Motor Carrier Safety Administration field office supervisor has pleaded guilty to accepting more than $41,000 in bribes to provide “inside information” and to ensure that some Canadian motor carriers received satisfactory safety ratings on FMCSA audits and inspections, according to court documents.

A new study has concluded that Boston should ban the transport of nearly all nonradioactive hazardous materials through the downtown and North End areas to protect the public.