A blow-up sex doll is being used as a new form of traffic calming measure in China. Annoyed that local police were not catching speeding motorists outside her home in Ningbo, Lin Chen took matters into her own hands. The 67-year-old bought a blow up sex doll and dressed in sexy red underwear to make motorists slow down to get a better look. "There are a set of traffic lights near my house and the cars just shoot through them as fast as they can. It's very dangerous," explained Chen. "The police aren't interested so I bought this doll and tied it to the tree. "I thought that drivers would slow down if I could give them something worth looking it," she added. Police admit that accident figures have dropped since Chen made the dummy. "It isn't a method we would use, but we can't say it isn't working," said a spokesman.