During the work, all of Napa Valley is open for business, especially the businesses along the construction area, and the contractors are committed to keeping both lanes open whenever possible during construction. You will find information on traffic impact here. If you wish to take an alternate route into St. Helena, this map illustrates the easiest and most convenient way to bypass the construction area. In an unprecedented effort, private and public entities and the utilities are working together in a coordinated effort to mitigate the short-term impacts of construction.