Automation of the London Underground

Automation of London Underground rolling stock has been partially implemented since the introduction of automatic train operation on the Hainault to Woodford section of the Central line in 1964. It is currently in use on four lines. Transport for London plans to extend this to other lines by 2022.

Historical projects

Partially automated trains using Automatic Train Operation (ATO) have been used on passenger services on the Victoria line since 1968.^[1] The side doors to the driver's cab were sealed, so that access was normally through the passenger saloon. Since the trains were to be operated by one person, the door controls were moved from the rear end of the motor car into the cab. The train control equipment was fitted beneath the centre seats, and consisted of a "black box", which interpreted signals received from the running rails. These were picked up by sensing coils mounted on the leading bogie. One rail supplied safety information, which was received continuously. Any failure to obtain this data resulted in a trip-valve operating, which stopped the train. The second rail supplied signal commands, which included speed signals and instructions to start and stop the train. This information was only provided when it was needed. The driver was renamed a train operator, and was responsible for opening and closing the doors at stations, and initiating a start from the stations, by pressing two buttons simultaneously. All other operation, including stopping at signals and restarting when safe to proceed was automatic. The automatic control equipment was temporarily mounted in the passenger saloon, between the cab and the first set of doors, to enable engineers to monitor and adjust it as experience was gained.

Current status

Partially automated trains are currently used on four lines (Jubilee, Central, Victoria and Northern).^[2] These trains still require drivers to open and close doors and in case of emergency. This will be extended to the other lines by 2022 and will also be used on Thameslink and Crossrail.

There are already driverless trains in operation on the Docklands Light Railway (DLR), although this is a relatively newly built line.^[3]

Boris Johnson promised in 2012 that there would be driverless Tube trains within 10 years. During his campaign to be re-elected as London Mayor, he said "TfL (Transport for London) will rapidly establish a timetable for introducing the first driverless trains to become operational on the London Underground network within a decade" which was cheered by Brian Paddick (Lib Dems) but Ken Livingstone (Labour) said that this was a 'vanity project' and Jenny Jones (Greens) said that she had concerns over the safety of driverless trains.^[4]

Richard Holloway, deputy cabinet member for sports, leisure and customer services at Westminster City Council, launched a petition in August 2015 to demand driverless trains.^[5]

Benefits and drawbacks

Possible benefits

• This would remove the possibility of strikes by drivers,^[6] which have caused widespread disruption, as well as the possibility of a driver being ill or otherwise unable to work at short notice. It would also save the cost of drivers' salaries and benefits.
• In Paris, automated metros have enabled trains to run every 85 seconds and this increase in services could be replicated on the Tube.^[7][8]
• It would enable easier running of the Night Tube, as drivers would not have to work anti-social hours and have to concentrate at times when they might be tired.
• Trains would not have to have a driver's compartment, reducing weight and the cost of building trains^[8]

Criticism

• There has been criticism from unions over safety and cost, as well as the accompanying reductions in staffing levels.^[9]
• It is more difficult to introduce driverless trains on existing lines (as opposed to new lines such as the DLR) as there are issues with signalling when there are both trains with drivers and without running at the same time.
• Christian Wolmar has written that, as Tube lines were not built with escape routes for passengers, in an emergency the passengers must be led away from the train by staff; he argues that this means there must still be a "train captain" on board, negating some of the benefits of driverless trains.^[10]

New Tube for London programme

The New Tube for London programme will include driverless tube trains. However these will initially have a driver on board until old stock has been fully replaced (i.e. Grade of Automation level 2, currently used on ATO-equipped lines). Even then, they will still have "train captains" on board in case of emergency (i.e. Grade of Automation level 3, as used by the DLR), due to driver union opposition of fully automated, unattended trains (i.e. Grade of Automation level 4, as used by some lines of the Paris Métro).

See also

• List of automated urban metro subway systems
• London Underground
• Automatic Train Operation

References

External links

• A history of driverless trains on the London Underground