FOI request detail

Weight of train IS4 and travelling speed

Request ID: FOI-2054-1819
Date published: 04 December 2018

You asked
Could I request the weight of train IS4 and travelling speed/ rick to the emergency brake bend applied on July 7th 2018, unit number 96053

We answered

4 December 2018

Thank you for your email received by Transport for London (TfL) on 8 November 2018.

Your request has been considered in accordance with the requirements of the Freedom of Information Act and our information access policy.  I can confirm we hold some of the information you require. You asked for:

Could I request the weight of train IS4 and travelling speed/ rick to the emergency brake bend applied on July 7th 2018, unit number 96053

Unit 96053/96054 had 3 emergency brake instances on the date in question. Please see below for details;  

  1. Unit 053/054 emergency braked on 07/07/2018 at 19:06:58 while travelling eastbound towards London Bridge. The train speed was 65 km/h when the emergency brake was applied. Train was medium loaded.

  1. Unit 053/054 emergency braked on 07/07/2018 at 18:42:16 while traveling eastbound towards Willesden Green. The train speed was 51 km/h when the emergency brake was applied. Train was medium loaded.

  1. Unit 053/054 emergency braked on 07/07/2018 at 10:48:38 while travelling eastbound towards Queensbury. The train speed was 64 km/h when the emergency brake was applied. Train was lightly loaded or empty.

When a train emergency brakes only friction brakes are applied so there is no electric/friction brake blending.

Car weight information is only recorded for normal service braking, not emergency braking. Weight is recorded by the system as shown above, not as absolute values.

If this is not the information you are looking for, or if you are unable to access it for some reason, please do not hesitate to contact me.

Please see the enclosed information sheet for details of your right to appeal as well as information on copyright and what to do if you would like to re-use any of the information we have disclosed.

Yours sincerely

Eva Hextall

FOI Case Officer

FOI Case Management Team

General Counsel

Transport for London

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