As a result, we estimate the return takes an average of 15 minutes to complete. However, returns are generally based on management information already held by operators which will help to minimise respondent burden. Respondent burden has not been assessed for the quarterly panel survey as returns are not submitted in a standard format. Table 1: Response rate for each quarterly panel in the 2020 to 2021 financial year. The charts below show the difference between the seasonally adjusted and non-seasonally adjusted data.Ĭhart 1: Local bus passenger journeys (seasonally adjusted) in England outside London and London, year ending March 2005 to year ending March 2021.
Non-seasonally adjusted data is also published as this provides a clearer picture of where demand for bus services falls throughout the year. Seasonal adjustment aims to remove seasonal changes in the data from one quarter to the next so that overall trends can be seen more clearly in the data.
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Returns are validated by comparison with the same quarter in previous years and seeking explanation where differences are large or unexpected.įigures are seasonally adjusted using the X12 ARIMA software package. Validation checks are used to ensure that any large changes compared with previous quarters are investigated.
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Data qualityĪs National Statistics, the quarterly panel statistics are produced to high professional standards as set out in the Code of Practice for statistics and many quality control measures are in place to ensure the integrity of the data.ĭata collection is carried out using Excel spreadsheets and email returns. The survey does not capture any details of the people using local bus services, such as their demographics, journey satisfaction, or the reasons behind their travel mode choice. While the survey captures the number of passenger boardings, it does not capture detailed information about the journeys, such as the origin and destination, or purpose of the journey. This is not the same as the number of passengers as one passenger may make multiple trips. The survey captures the number of passenger boardings, or journeys. As new data becomes available the seasonal adjustment can also cause changes to the way passenger journeys are distributed within each year, although this will not cause the overall annual totals to change. Quarterly estimates are therefore subject to future revision following publication of the annual estimates. The quarterly panel figures are adjusted to be consistent with the annual figures from the PSV Survey once they become available. Although over 90% of bus journeys in Great Britain are covered by the quarterly panel, the PSV survey provides better coverage as it aims to cover more journeys and many smaller operators. The quarterly panel is based on a sample of the largest local bus operators. The quarterly also allows for analysis of seasonal trends in local bus passenger journeys. As a result, the publication of these statistics is timelier.
The quarterly panel collects data more frequently than the annual public service vehicle ( PSV) survey. The first quarterly panel survey covered the period from April to June 2004 and the survey has been running on a quarterly basis since. Figures provided by operators are aggregated by type of area. The survey provides quarterly estimates of passenger journeys figures (given in Table BUS0106) and the first provisional estimate of the annual figure (for example, the 2011 to 2012 figure can be estimated when data up to quarter 1 (January to March), 2012 have been collected). The quarterly panel survey covers over 90% of the journeys made in Great Britain. The quarterly bus panel is a quarterly survey of the 18 largest non-metropolitan operators, Passenger Transport Executives (for the metropolitan areas) and Transport for London. Quarterly panel survey of passenger numbers Coverage This report outlines some of the quality aspects of the data. The quarterly bus statistics release is produced to high professional standards set out in the Code of Practice for Statistics and were confirmed as National Statistics in February 2013. The quarterly bus statistics release is compiled from surveys of a sample of local bus operators that collect information on passenger journeys and fare changes during each quarter. The quarterly release includes data on passenger numbers and bus fare levels.
This document supports the latest quarterly bus statistics.
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