Photo by Tudor Van Hampton Ford's EcoBoost light-duty pickup gets 22 mpg on the highway today. Increased fuel efficiency will come with a shortfall of highway construction work if tax revenues aren't bolstered. President Obama's proposal to boost automakers' Corporate Average Fuel Economy to 54.5 miles per gallon by 2025 will take a significant bite out of fuel-tax receipts flowing into the Highway Trust Fund, say road builders, who are pushing for a funding revamp.The most recent CAFE standard, proposed July 29 for all light-duty vehicles, would cut $65 billion out of federal funding for state and local highway, bridge
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.