Frontal crash tests in laboratories are strong predictors of passenger cars’ safety on the road, though they fail to accurately project driver fatality risks for trucks, according to a recent study. The study examined the frontal crash test ratings that vehicles received from the National Highway Traffic Safety Administration, and compared them to fatality rates in the vehicles. It also compared a smaller sample of test ratings given by the privately funded Insurance Institute for Highway Safety, which uses a 40-percent frontal offset crash test, with the vehicles’ fatality rates.