The surrounding businesses were not affected by the change in May 1902 and set on their own markings. The lines of the urban trams and the meterspurigen lines of the Teltower circular orbits were still marked with signal panels, on the other hand, the BESTAG and in Heiligensee, not the lines, but only the targets were marked with different colored signs. In 1908, the Spandauer Straßenbahn introduced the line identification with letters, which corresponded to the initial letter of the destination (line P to Pichelsdorf, etc.), in 1917 the company switched to numbers. In Cöpenick, the lines were marked from 1906 with numbers, from 1910 additionally with colored signal panels for the individual routes (red lines to Friedrichshagen, etc.). The Berlin Ostbahnen used from 1913 also like the SBV Roman numbers as line numbers. The other companies, including the standard-gauge lines of the Teltower Kreisbahnen, did not use a line marking.