A part of the G40 expressway will be closed on Friday due to a bike race  in Chongming District, police announced on Sunday. The expressway, which is a major route between urban Shanghai and Chongming Island, will be closed from Gaodong to Chenhai toll gates between 11am and 1pm. Traffic in the other direction won't be affected. Some other streets in the district will also be closed intermittently next week.