Freightliner ranked highest in customer satisfaction for both the vocational and on-highway segments. Related Links: Retooling for Clean Diesels Read the J.D. Power Results Owners of heavy-duty trucks, such as Class 8 dump trucks, concrete mixers and tractor trailers, report increasing quality problems due to the latest round of clean-diesel regulations, according to a study from J.D. Power and Associates released late last month.Trucks that are one year old decreased in quality from the previous model year, says J.D. Power, which, like ENR, is a unit of the McGraw-Hill Cos. Problems rose 9% and are mostly related
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.