Routing the 沈海高速 relations through here seems dubious. The only source I can find that suggests it goes through here is Baidu Wiki, but even then it suggests that 沈海高速 will turn towards 洋门枢纽 after 浦口枢纽. In all other places this is marked as a "branch route" of the G15, and indeed even on OSM the name of the highway is marked as something other than 沈海高速.