Contents - Barking & Dagenham

Barking Station Interchange
3. BODS Data
Introduction
Bus Origin and Destination Survey (BODS) is, as it says, data on bus journeys made within
London. It is held by TfL on a database, which when interrogated, produces spreadsheets for
each bus stop on the selected route. The bus stops we studied are shown in figure 3.1 below.
10 bus routes pass Barking station (5, 62, 169, 179, 238, 287, 366, 368, 369, 387). The BODS
data allow us to build up a picture of bus users and if they change onto other modes. A TfL map is
shown in figure 2.4 above.
Data for all boarding and alighting passengers who answered that they were travelling to or from
the Underground as well as for those who provided no answer on their previous or next mode of
travel were extracted from the BODS data base.
Two points should be noted about BODS:
• The survey is undertaken on each route once every 5 years. Given recent growth in bus
patronage, there is a time lag factor to the BODS data which may result in inaccuracy;
factoring BODS values to current year values using data from on-bus ticket machines
(BREMS) has therefore been carried out. In the case of the routes serving Barking, the dates
of the analysis vary from 2002 to 2007. We have identified the week and year of the BODS
survey and the equivalent week in 2007. We have then calculated a factor for each route to
gain 2007 values using an average value for the six week period around each week of the
survey.
• The total boarding and alighting figures in BODS are quite accurate. However, data for mode
of access and egress are derived from the self-completion element of the survey. Hence
these figures require ‘grossing up’, and should be regarded as estimates.
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