Lisbon Metro has 4 Lines and 3 Depots (PMO's), including a total of 28 Interlocking, 23 of them have been implemented by Invensys Rail Dimetronic. In two of the three Depots, PMOII and PMOIII, Invensys Rail Dimetronichas implemented electronic interlocking SSI type. The third Depot is integrated in the electronic interlocking Westrace of Praça de Espanha that belongs to the Line A (Blue). The number and type of interlocking implemented or under implementation by Invensys Rail Dimetronic is the following:

• Line"A": 6 Westrace Electronic Interlocking installed from 1995 to 2004. 1 Relay Interlocking installed in 1998. Two more Westraces were installed in 2005.

• Line"B": 5 Westrace Electronic Interlocking, one of them installed in 1998 and the other in 2003. 1 Relay Interlocking installed in 1998.

• Line"C": 5 Westrace Electronic Interlocking installed between 1998 and 2002. 1 Relay Interlocking installed in 1993.

• CTC: Invensys Rail Dimetronic has implemented the CTC of Lisbon Metro that controls Lines "A", "B" and "C" with a total of 17 interlocking.