of civil engineers gives u.s. infrastructure a d-plus. and 1 in 9 of the nation s bridges are structurally deficient. look no further than delaware for wahat the impact could look like. an emergency shutdown of the critical bridge. the problem, cracks and leaning support columns. old underground pipes breaking in cities across the country, causing major flooding. the president and transportation secretary anthony fox say failure to fund repairs and improvements will cost americans in more ways than one. how many jobses potentially at stake here? we re estimating 700,000 jobs at risk. reporter: in 2011, commuters wasted 2.9 billion gal bes of gas just sitting in traffic. costing the average consumer more than $800 per year according to one study. the highway trust fund gets revenue from an 18.4 cent per gallon gas tax.