TRAINS AND ELECTRICAL AND MECHANICAL EQUIPMENT FOR THE JUBILEE LINE EXTENSION.

The £3 billion plus extension to the Jubilee Line features the most up-to-date trains and electrical and mechanical systems. It positively bristles with innovative safety and control features, from platform-edge doors and a virtually uninterruptable power supply to in-train video and intercom systems. The proposed moving-block signalling had not been used before on such a large mass-transit system and particular problems with implementation on the live existing section resulted in the system being deferred in favour of an interim fixed-block system with a capacity of 24 trains per hour. In addition to the signalling, this paper describes the trains, lifts, escalators, ticket barriers and platform-edge doors as well as the communication, power, fire and ventilation systems.