Route 3 Country Park Section is a 10.1 km toll road which starts from Ting Kau at the south end, travelling under the Tai Lam Country Park to Au Tau, Yuen Long. There are several exits connecting to nearby districts such as Kam Tin, San Tin, Pat Heung, Yuen Long, Tsuen Wan and Tsing Yi. The toll plaza is located about 1 km north of Tai Lam Tunnel Yuen Long bound exit. The whole expressway operates in a build-operate-transfer (BOT) mode with a 30-year franchise.