The National Highway Traffic Safety Administration asked automakers to address the compatibility issue amid concern about the changing vehicle mix on U. s. roads.
国家公路交通安全管理局要求汽车制造商，以解决相容性问题中有关美国的道路上不断变化的车辆混合的关注。
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Locals don't even pay much attention to signs like this. I was shocked to see a highway sign to address such a serious problem.