With the timetable change on 12 December 2004, the ten-minute headway on the S 4 from Maisach to Zorneding and on the S 5 from Germering-Unterpfaffenhofen to Deisenhofen was introduced during rush hour, doubling the number of trains offered from three to six per hour. Since 11 December 2005 this is also offered on the western section of the S 2 to Dachau. This means there are now 30 trains per hour and direction on the trunk line during rush hour.