Over a quarter of bridges in the US are structurally deficient or functionally obsolete according to a report published today by the American Society of Civil Engineers. It will cost US$9.4 billion a year for 20 years to eliminate all difficiencies in the country's 590,750 bridges says the 2005 Report card for America's infrastructure.. Bridges are given the same "C" (mediocre) rating as in 2004. There was however a slight decrease in those rated structurally deficient or functionally obsolete, from 28.5% to 27%. Long term underinvestment is compounded by the lack of a federal transport programme claims the ASCE. The "grade point average" for infrastructure as a whole was "D", meaning poor.