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Amazon.com on Nov. 12 took delivery of the 40th and final plane in a lease deal for its expanding air-cargo operation. More may be on the way. A senior executive at an aircraft lessor said Amazon was shopping around for more Boeing 767 freighters and had put out a request for proposals for an additional six jets earlier this year.

Volvo Trucks North America entered into a memorandum of understanding with Trimble Transportation Enterprise to develop future transportation management and fleet maintenance products and services.

Amazon.com rapidly is adding delivery stations across the country to better handle the rising number of orders it receives, and a big one landed on Centennial’s porch last month.

Trailer side skirts and various types of air deflectors, which are intended to boost a tractor-trailer’s aerodynamic efficiency, will save motor carriers more fuel with frequent inspections and proper repairs.

A huge swath of the United States lies ­within the “salt belt,” which is the states that use large amounts of salt during the winter to control snow and ice on roadways. These states primarily are located in the Northeast, Mid-Atlantic and Midwest portions of the country.

Tire failures remain the No. 1 reason for roadside assistance calls. And most tire-related problems come from underinflation as a result of leaks, punctures or just poor maintenance programs.