Because of the frequency being brought up to 'metro' level, its line number was altered to the lower regions, for those are the metro and so-called 'Chrono' tramlines.
The tram route formed a half-circle from the south of Brussels to its north via the eastern part of the city.
Starting at the Vanderkindere crossroad on the greater ring road in the municipality of Uccle, the tram ran in the middle of this road up to the Bois de la Cambre, that the tram route avoids via Chaussée de Waterloo/Waterloosesteenweg, Avenue Legrand/Legrandlaan and Boulevard de la Cambre/Terkamerenlaan, crossing the municipalities of Ixelles, City of Brussels and Ixelles again.
At this point, the tram route followed the greater ring road up to the Gros Tilleul/Dikke Linde, crossing the municipalities of Etterbeek past the Etterbeek railway station, Woluwe-Saint-Pierre at the Montgomery metro station, Woluwe-Saint-Lambert at the Georges Henri premetro station, Schaerbeek up to the Teichman bridge, and the City of Brussels again.
Past the Gros Tilleul crossroad, the tram route ran under the Parc de Laeken/Lakenpark up to the Centenaire stop, and then joined the Heysel metro station via another tunnel.