29-10-1901: S.A. El
Tibidabo (Tramvia Blau) > Av.
Tibidabo - Pl. Dr. Andreu (+1.276
km)
14-01-1976: S.A. El Tibidabo (Tramvia Blau)
> Av. Tibidabo - Pl. Dr.
Andreu (-1.276 km) closed
01-05-1985: S.A. El Tibidabo (Tramvia Blau)
> Av. Tibidabo - Pl. Dr.
Andreu (+1.276 km) reopened
14-12-1991: Tramvia Blau > Av.
Tibidabo - Pl. Dr. Andreu
(1.276 km) [reopened after modernization]