AN anti-road racing operation netted 13 people, most of them women, after two high-speed chases in Tai Po early yesterday. The first incident was just after 1 am when two cars were seen speeding on Ting Kok Road. They were forced to stop near Lo Tsz Tin village. Three hours later two cars were stopped on the Tolo Highway, near Tai Po marine base. The 13 were released on bail.