This line was created on 14 March 2011, replacing tram routes 23 and 24. Routes 23 and 24 followed the same trajectory between Vanderkindere and Princesse Elisabeth/Prinses Elizabeth, where route 23 deviated towards Schaarbeek railway station, one stop further. Together with tram routes 4, 8, 9, and 10, it is one of five 'chrono' lines, which means that it is served by low-floor high-capacity trams with a high frequency. The low line number chosen for the new line shows that it is either a metro line or a 'chrono' line.
Route
Heysel/Heizel - Centenaire/Eeuwfeest - De wand - Araucaria - Buissonets/Braambosjes - Heembeek - van Praet - Docks Bruxsel - Princesse Elisabeth/Prinses Elizabeth - Demolder - Hôpital Paul Brien/Paul Brien-ziekenhuis - Louis Bertrand - Héliotropes/Heliotropen - Chazal - Léopold III/Leopold III - Meiser - Diamant - Georges Henri - Montgomery - Boileau - Pétillon - Arsenal/Arsenaal - VUB - Etterbeek Gare/Etterbeek Station - Roffiaen - Buyl - Cambre-Étoile/Ter Kameren-Ster - Legrand - Longchamp - Gossart - Cavell - Churchill - Vanderkindere
Frequency
During the daytime, a tram passes every 7½ minutes, rising to every 6 minutes during peak hours.
Rolling stock
The line is fully served by the Brussels low-floor trams (the T3000 and T4000).