Accidents on the TLRN

Meeting: 
MQT on 2013-05-22
Session date: 
May 22, 2013
Reference: 
2013/1241
Question By: 
Caroline Pidgeon
Organisation: 
Liberal Democrats
Asked Of: 
The Mayor
Category: 

Question

Page 8 of the Managing Director's Report to the 23rd April Surface Transport Panel states that the number of hours of disruption caused by accidents on the TLRN increased from 21 to 82 hours between 2nd February 2013 and 2nd March 2013. Please explain why the number of hours of disruption on the TLRN increased by 390% in the period?

Answer

Answer for Accidents on the TLRN

Answer for Accidents on the TLRN

Answered By: 
The Mayor

The number of hours of serious and severe hours of traffic disruption associated with accidents on the TLRN varies considerably from period to period. The average amount of serious and severe duration related to accidents across the last 5 years has been 55 hours, but the range of hours recorded by period has varied between 21 hours and 99 hours. Over the last 5 years, the average serious and severe duration trend has been remarkably stable, albeit with high period on period variation.

The 21 hours of serious and severe disruption from 26 events in Period 12, 2011/12 (5 February - 3 March), was the lowest recorded in the last two years. The 82 hours of serious and severe disruption from 44 events in Period 12, 2012/13 (2 February - 2 March), was the third highest recorded in the last two years. It so happens that the two points are at the extreme ends of the observed spectrum.

There is no single or specific reason for the significant increase in disruption caused by accidents on the TLRN in Period 12, 2012/13. While TfL continues to look for improvements in clear up times following collisions and other unplanned incidents, their locations and times can sometimes result in significant disruption and short-term residual congestion despite best efforts. Certainly, incident responses (including use of traffic signal plans and prompt mobilisation of police and contractors) helped to ensure that the majority of incidents in the period caused less than three hours of disruption, with 15 of the incidents lasting for less than one hour.