In addition to motorist safety, there are also concerns about the impact heavier trucks would have on our roads and bridges, which are already severely stressed. As it is, there is not enough money to repair or rebuild our transportation infrastructure. Maryland, for example, has more than 1,322 highway bridges classified as structurally deficient or functionally obsolete, according to the Department of Transportation's 2010 National Bridge Inventory. That's an important part of the equation, because Congress is considering pushing our roads and bridges past their breaking point with these big-truck measures. We cannot, in good conscience, allow that to happen without a fight. At minimum, Congress should comprehensively study the impact of such a move before even considering passing such laws. Decisions on increasing truck weights by 81/2 tons or allowing huge triple trailer trucks will impact the safety of everyone.