Diesel fuel’s national average price fell 6.5 cents to $3.958 a gallon, the 10th straight weekly decline and the first time it has fallen below the $4 mark in almost six months, the Department of Energy said Sept. 22, although a surge in crude oil prices added uncertainty to the outlook.

A federal appeals court Wednesday denied a motion to block a clean trucks program at the Southern California ports of Long Beach and Los Angeles, allowing the sister ports to begin implementation of the program Oct. 1, the Contra Costa (Calif.) Times newspaper reported.

Existing homes sales fell 2.2% in August, the greatest monthly decrease on record, the National Association of Realtors said Wednesday.

Freight railroad Union Pacific Corp. Tuesday boosted its third-quarter earnings forecast due to lower fuel prices and improved operating efficiency.

Logistics and delivery firm Dynamex Inc. reported an improved fiscal fourth-quarter profit and said it was searching for a new chief executive officer.

In honor of National Trucking Week, Sept. 7-14, let’s take a minute to think about the trucking industry and the thousands of men and women who work within it to make our lives functional, comfortable, healthy and safe.

In a sweeping decision with possible national implications, the Environmental Protection Agency has granted California a waiver that will allow state environmental regulators to implement stringent new heavy-duty vehicle and engine onboard diagnostics requirements for 2010 engines and beyond.