Request ID: FOI-2860-2324 Date published: 30 November 2023
You asked
Please would you be able to provide me with reports and data on (or could be used to work out) the punctuality of bus 55 along lea bridge road. Anything highlighting rush hour would be of particular interest. Ideally for the last ten years if possible.
Perhaps iBus information or similar is available?
Thanks,
We answered
Our ref: FOI-2860-2324/GH
Thank you for your request received by Transport for London (TfL) on 10 November 2023 asking for information about Lea bridge Road, Bus route 55 punctuality.
Your request has been considered under the requirements of the Freedom of Information Act 2000 and our information access policy. I can confirm that we do hold some of the information you require.
Please find attached the performance data for Route 55 along the Lea Bridge Road section (Leyton High Road to Clapton Pond). Our iBus system contains only two years of data, therefore the dataset is limited to this time period.
The reports displays data by financial period (which are 4 weeks in duration), in each direction, at the QSI points located at the specified section, between the hours of 0500h and 2359h.
How to Interpret Results Bus routes are split into two categories - high and low frequency. Routes are monitored at a number of keypoint locations, throughout the course of the route, in both directions, with the exception of within one kilometre of a route's terminus arrival. Route 55 is a high frequency (non-timetabled) service, for which a detailed timetable is not generally published. Most have weekday peak frequencies of five or more buses per hour (i.e. a service frequency of 12 minutes or more frequent). Statistics are calculated from iBus data for most scheduled timing points (QSI points) in both directions. The results shown comprise of service monitoring between 0500 and 2359 hours every day. Statistics shown are:
Scheduled Waiting Time (SWT) in minutes
The time passengers would wait, on average, if the service ran exactly as scheduled during the periods observed.
Excess Waiting Time (EWT) in minutes
The difference between 1) and 3), representing the additional wait experienced by passengers due to the irregular spacing of buses or those that failed to run.
Average Waiting Time (AWT) in minutes
The average time that passengers actually waited.
Probability of waiting less than 10, 10-20, 20-30, more than 30 minutes, Long Gaps
Gives an indication of the variation in individual waiting times.
Please let me know if this is not the information you are looking for, or if you are unable to access it for some reason.
If you are not satisfied with this response please see the attached information sheet for details of your right to appeal.
Yours sincerely
Graham Hurt FOI Case Officer FOI Case Management Team General Counsel Transport for London
