Construction has already started on Suzhou's metro line 3. Line 3 has 37 stations in total and it links SND to Wuzhong to the CBD area in SIP. Construction will last through 2019. Click here for an overview of line 3.
Dushu Lake Tunnel to Open 24/7 | 独墅湖隧道将24小时通行
The tunnel, which currently closes from midnight to 06:00, will open 24 hours a day from November 1st. Please note that regular maintenance will still take place at night resulting in the closure of one or two lanes.