Automotive side windows that resist crowbars are infiltrating the luxury car market, but they could become commonplace if the National Highway and Traffic Safety Administration (NHSTA) writes tougher rules on rollover accidents, according to the Detroit Free Press. Windows made like windshields, with a plastic layer inside, don't shatter when broken. By holding together in a rollover accident, they could keep heads, arms and bodies inside the car. But they cost manufacturers about five times more than regular tempered glass, suppliers say, and that costs consumers about $300 when they are offered as an option. Nine U.S. auto suppliers organized as the Enhanced Protective Glass Automotive Association (EPGAA) have teamed with special interest groups including the Center for Automotive Safety to lobby Congress, according to the Free Press.