Eight more cities are likely to announce policies this year curbing the purchase of vehicles for private use, as worries about pollution and traffic congestion rise around the country, an official from the China Association of Automobile Manufacturers said on Wednesday.

Four cities already have such curbs: Beijing, Shanghai, Guangzhou in Guangdong province and Guiyang in Guizhou province.

Tianjin, Chongqing, Chengdu in Sichuan province, Hangzhou in Zhejiang province, Shenzhen in Guangdong province, Qingdao in Shandong province, Shijiazhuang in Hebei province and Wuhan in Hubei province are likely to introduce vehicle purchase quotas, said Shi Jianhua, deputy secretary-general of CAAM.