Northern Line

MQT on 2006-07-12
Session date: 
July 12, 2006
Question By: 
Brian Coleman
GLA Conservatives
Asked Of: 
The Mayor


How many signal failures and multiple signal failures there have been on the Northern Line during the two most recent periods (covering June and July 2006)?


Answer for Northern Line

Answer for Northern Line

Answered By: 
The Mayor

LU compiles its performance statistics on the basis of 4-week periods rather than calendar months. The most recent two periods for which results are available are period 2 (30 April - 27 May 2006), when there were 20 failures, and period 3 (28 May - 24 June 2006) when there were 21 failures.These are the number of signal failures that were attributable to Infracos and that resulted in service disruptions of two minutes or more. A single incident that causes more than one signal to fail is counted as 1 in the total.