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Federal officials are cracking down on moving companies that try to evade regulations for household-goods movers, saying companies that provide moving containers and the laborers to load the containers should be treated as movers under the law.

MONTREAL — Navistar International Corp. unveiled updated versions of its International 9900i and PayStar 5900 SBA heavy-haul and severe-service models with the Cummins ISX15 engine using selective catalytic reduction technology.

Attorneys for American Trucking Associations and the Port of Los Angeles are scheduled to face off at the U.S. Supreme Court this week over the constitutionality of some requirements included in the port’s “clean truck” concession agreement with drayage operators.

U.S. retail diesel and gasoline prices continued to drift down from their winter highs, with both refined products declining for a sixth straight week, the Department of Energy reported.

Drayage drivers are growing increasingly reluctant to pull container chassis because they fear high violation levels on that equipment will hurt their safety records, according to several industry officials.

Trucking failures doubled in the first quarter of 2013, reaching the highest level in nearly two years, and will keep rising because fleets’ costs are increasing twice as fast as revenue, according to a new investment report.

President Obama’s 2014 budget contains a one-time boost of $27 billion for “critical highway infrastructure” and cross-border roads to augment the $41 billion Congress has already authorized for highways next year.