| Paccar, Navistar and Volvo have deferred shipments of Class 8 vehicles equipped with the faulty part.

| Two years ago, the American Trucking Associations and others filed suit against the state board’s low carbon fuel standard.

| Five texting and cell phone use violations will now contribute the highest (10 points) weighted severity to carriers’ numerical rankings.

| California Air Resources Board had issued a public letter to Navistar saying the company's emissions credits for the engine will expire Feb. ...