the load limit is reduced for the Rhine Bridge to a load limit of 18 tons per axle and 5 tons per metre, corresponding to class B1 traffic. Engineering structures The route has three major engineering structures: The 78 metre-long three span stone bridge over the Limmat. The 181 metre-long tunnel in Koblenz. The 190 metre-long bridge over the Rhine, which has, on the Swiss side, a 60-metre brick approach, while the Rhine is crossed on a 130-metre-long steel truss, resting on two intermediate piers. The main part of the bridge dates back to its opening in 1859 and has only been reinforced since. Stations The original three intermediate stations at Siggenthal, Döttingen and Koblenz have identical station building, which in turn are identical with the building on the Brugg–Aarau railway, built the same year. Turgi station until its conversion between 1994 and 97 was a "wedge" station (Keilbahnhof). Siggenthal-Würenlingen station was added in 1912 to serve the Siggenthal cement works, now part of Holcim and has a large volume of freight traffic. Döttingen station was called Döttingen Klingnau station from 1897 to 2002. Klingnau station opened on 12 December 2002 with a 220-metre-long platform. Koblenz station was built in a convenient location to the south of the actual village of Koblenz and has been a rail junction since the opening of the lines to Bülach and Winterthur and Stein-Säckingen. The NOB established a small locomotive depot at the station. Because of the unfavourable position of Koblenz station for the people Koblenz train, Koblenz Dorf station was established on the line to Winterthur in 1997. This stop is located close to the Rhine Bridge. Passenger traffic on the line to Stein-Säckingen has been transferred to road between Laufenburg and Koblenz. Waldshut station was a border station and used to have customs controls. As a result, it had to be extended several times. Since Switzerland became part of the Schengen Area in 2008, checks on people have disappeared and the declaration of goods for customs is no longer carried out there. Waldshut station has also long had a locomotive depot. Traffic The transit of freight over the Rhine Bridge was discontinued in 1991. Local freight traffic on the Rhine bridge was closed in 2001. Schedule today (since 2008) The Baden–Koblenz–Waldshut route has timetable number 701. Trains run on the route every half hour. There is an hourly pair of trains between