the mangfall bridge is a motorway bridge across the valley of the mangfall north of weyarn in upper bavaria, germany, which carries bundesautobahn 8 between munich and rosenheim. the original bridge, designed by german bestelmeyer, opened in january 1936 as one of the first large bridges in the reichsautobahn system and was influential in its design. destroyed at the end of world war ii, this bridge was replaced with a temporary structure in 1948; the current bridge consists of a replacement built in 1958–60 to a design by gerd lohmer and ulrich finsterwalder and a second span for traffic in one direction which was added in the late 1970s when the autobahn was widened to six lanes.