Phase II West is a 45.5 km closed system expressway with a total of six lanes in dual directions.  It is connected to Phase I West in Shunde at the northern end and extends southwards to Zhongshan, linking with the National Highway 105, Xiaolan Highway and Qijiang Highway (both currently under construction).  Phase I West and Phase II West are principal expressways linking Guangzhou to the central area of Zhongshan.  They are expected to shorten the travel time between Guangzhou City and Zhongshan to around 30 minutes from over one hour on existing local roads.