News brief

Heavy rains cause road collapse in China. A section of a highway collapsed after heavy rains in a mountainous area in southern China, sending cars tumbling down a slope and leaving at least 48 people dead. China has massively expanded its infrastructure in recent years, adding more than 1 million highway bridges, the world’s largest network of high-speed trains, and scores of new airports. In the rush to build, flaws in design and construction methods have frequently come to light.