Sonnborner Kreuz to complete. The six-lane extension of the section Wermelskirchen junction to Remscheid junction began on 9 May 2005. The Remscheid junction was expanded until 2008. The expansion of the highway required a lowering of the carriageways, especially because of the landmarked railway bridge. The expansion was largely completed in 2012. Conversion and refurbishment of the valley bridge Höllenbach was delayed and lasted until the winter of 2017/2018, which is why in 2018, the six-lane traffic guidance will be established in this section. In the area of the Cologne ring, the A 1 is also completely six-lane. Between Cologne-Bocklemünd and Kreuz Köln-West, three lanes have been opened per direction of travel since December 2012. The 1550 meter long enclosure Lövenich was completed by early 2013. The safety tests in the tunnel were declared over in May 2014. The speed in the tunnel is limited to 80 km / h. The section between Cologne-Bocklemünd and the cross Cologne north is six-lane since November 2015. The eight-lane expansion from Cologne-Niehl to the intersection Köln-Nord is planned in the Fernstraßenausbaugesetz as further need with planning right. The six-lane expansion from the intersection Köln-West to the triangle Erfttal is classified as Priority Needs - bottleneck elimination, the eight-lane extension of the following common section with the A 61 to the Bliesheim Cross is classified in further demand with planning rights. Due to considerable damage in the bridge construction, a new construction of the Rhine bridge Leverkusen is planned. Meanwhile, the existing bridge for vehicles over 3.5 t total weight has been blocked. This leads to significant problems, since almost at the same time due to damage to the bridge construction, the Zoobrücke in Cologne fails as alternative route, since the city of Cologne had to introduce a limit to 7.5 t total weight for this bridge and on the federal highway A57 at Dormagen a motorway bridge destroyed by an arson attack and only replaced by a makeshift bridge. Following the implementation of the most urgent repairs on the Rheinbrücke Leverkusen, there has been a ban since May 2013 for vehicles over 44 t total weight, which has since been downgraded to 3.5 t. The maximum speed limit for all vehicles is limited to 60 km / h. To monitor the maximum speed and weight, stationary speed monitoring systems were installed on the bridge in both directions at the beginning and in the