Gaoyou expressway working hours

Employees in expressway generally go to work 24 hours a day, regardless of time. They all go to work as long as vehicles pass by, unless expressway is closed or expressway is caught in fog or extreme weather. As long as it is not closed, they will go to work 24 hours a day, so you can go through expressway at any time except for fog and extreme weather. This is this, it will be off, but it won't be off at ordinary times.