at the stations "innsbrucker ring" (u2/u5) and "scheidplatz" (u2/u3) there are four tracks with two platforms. to change trains you only have to go to the other side of the platforms. two lines cross at these stations. the stations "hauptbahnhof (central station)" (u1/u2) and "münchner freiheit" (u3/u6) have four tracks. at the "hauptbahnhof" there are two more tracks on another level for the u4 and u5. here two lines separate. the stations "kolumbusplatz" (u1/u2), "implerstraße" (u3/u6) and "max-weber-platz" (u4/u5) have three platforms. two for trains to the city and one for trains from the city. two lines separate at these stations.