According to a media release from the Federal Roads Authority (Winterthur branch), for the year 2014/2015, the expansion of the previously two-lane section of Route Andelfingen to Winterthur North Branch, into a four-lane mini-freeway, is also officially approved.
the A4 will create a long tunnel with a slope of 4.5 percent, through the Galgenbuck Klettgau to the main road into the 13th link with the A4 intersections.