Source: J.D. Power European diesel truck and engine brands placed highest in recent J.D. Power studies. Related Links: Ford Offers Gas When Diesel Is Too Much Navistar Makes U-Turn, Arrives at Cummins The biggest diesel trucks on the road have taken a "precipitous drop" in reliability as vehicle manufacturers have incorporated new emissions controls required by the U.S. Environmental Protection Agency, says one expert at J.D. Power and Associates.In two separate studies this summer, J.D. Power surveyed fleet managers in the heavy-freight and vocational, or work truck, vehicle categories. The studies cover Class 8 trucks and engines for the 2011
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.