out – making the crossing free of charge. There are currently three places where it is possible to cross the canal on foot or by car, plus two railway bridges. The northernmost link is the Mälarbron bridge, which has three predecessors: the swing bridge from the 19th century, and another swing bridge that was used between 1910 and 1924. Both stood about 150 meters south of the current Mälarbron bridge. In 1924, the first bascule bridge opened. It was often referred to as simply or (English: “the Bascule bridge” or "the Country Road Bridge"). It was a double flap bridge with two fixed bridge vaults on each side. Ragnar Hjort made the architectural design. After World War II, it could no longer handle the increased traffic volume. Hence, the current Mälarbron was commissioned, and opened in 1971. It is equipped with a control tower. Today the bridge together with the whole route from Landsort in to Mälaren is remote controlled from the locks in Södertälje. The most central crossing is at the canal lock, and consists of the two bridges Marenbron, which crosses Lake Maren, and Slussbron, which crosses the canal itself. In 1963 the first bridge over the Maren was built. It was intended as a temporary link, and was subsequently demolished in 1993. The Marenbron was later replaced by a pedestrian and bicycle bridge. The initial plan was to have it removed during the summer, allowing small boats to reach the inner parts of the lake. It did however become a year-round fixed link. In September 2003, a referendum among the residents of Södertälje Municipality was held, where they could decide if they wanted a new car bridge to be commissioned at the site. The costs were estimated to 40 million Swedish krona. At the referendum, 56.5 percent voted no and 39.4 percent favourably, meaning no new car bridge was built. Suggestions to build an arch bridge or bascule bridge for pedestrians and cyclists have been brought forward. It would allow boats to pass under and reach the inner parts of Lake Maren in the centremost parts of the city. Pedestrians have also been able to cross the canal itself by walking across the lock gates. The Saltsjöbron and E4-bron bridges constitute the southernmost crossing for cars and pedestrians. They run between the districts of Södra and Viksängen in Södertälje's southern parts. Saltsjöbron is a bascule bridge, and