Related Links: Results of AGC safety survey DOT Secretary LaHood's blog on work zone safety More than two-thirds of highway contractors responding to a new Associated General Contractors of America survey say that motor vehicles crashed into their work zones over the past 12 months and almost one-fifth reported construction-worker fatalities in those accidents.AGC released the survey on April 23, near the start of National Work Zone Awareness Week, a joint industry-government effort to put a spotlight on the dangers on highway job sites and reduce fatalities and injuries.There has been progress. According to U.S. Dept. of Transportation statistics, there
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.