US drivers ignore hi-tech safety features in cars, citing complexity and cost, or else rely on them too much, with both habits potentially making roads more dangerous. While new cars are “increasingly equipped with advanced vehicle technologies that could help reduce crashes and fatalities,” the gadgets’ effect is limited as some drivers switch them off and others don’t understand how to use them, according to the US Government Accountability Office (GAO), which surveyed consumers and car industry representatives, including car manufacturers and dealers. The GAO found drivers to have “misperce…