The most elaborate section lies between the junctions Würzburg-Heidingsfeld and Würzburg / Randersacker and is 5.4 km long. In May 2008, after contradictions by the city of Würzburg, a new plan approval procedure was initiated, which was concluded with the plan approval decision of 17 December 2009. Afterwards, the valley bridge Heidingsfeld should be lowered and the district Heuchelhof underpassed with the Katzenberg tunnel. It is expected to have a construction time of about five and a half years. An action was brought against the decision, which the Federal Administrative Court dismissed by judgment of 3 March 2011. The preparatory work began in September 2012, the construction work in July 2014. By December 2017, the first phase of construction, consisting of the northern directional lane, the future direction Frankfurt, to be completed. Afterwards, the existing bridge will be demolished and the 2nd construction phase started. Completion with the release of both lanes is planned for the end of 2019.