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Road traffic statistics

27123

Details

AADF latest year 2024
Region South West
Local authority Swindon
Road name A420
Road type Major
Start junction road supermarket roundabout
End junction road LA Boundary
Link length 2.80km (1.74 miles)
Easting & Northing 420540,187202
Latitude & longitude 51.58331,-1.70494

Location

Contents

Average Annual Daily Flow

Average annual daily flow
Year Count method All motor vehicles Cars & taxis LGVs HGVs Pedal cycles Motorcycles Buses & coaches
2024 Estimated using AADF from previous year on this link 21,519 16,026 3,852 1,363 19 188 90
2023 Estimated using AADF from previous year on this link 21,273 15,835 3,785 1,373 20 190 90
2022 Manual count 20,866 15,452 3,712 1,407 21 204 91
2021 Estimated using AADF from previous year on this link 18,708 13,896 3,356 1,249 3 133 74
2020 Estimated using AADF from previous year on this link 16,995 12,707 2,931 1,166 5 129 62
2019 Estimated using AADF from previous year on this link 22,395 17,401 3,424 1,299 4 173 97
2018 Manual count 22,351 17,363 3,435 1,294 3 161 98
2017 Estimated using AADF from previous year on this link 24,950 19,634 3,077 1,940 20 208 91
2016 Estimated using AADF from previous year on this link 24,770 19,658 2,908 1,897 19 214 93
2015 Estimated using AADF from previous year on this link 24,278 19,417 2,693 1,861 20 214 94
2014 Manual count 23,321 18,848 2,422 1,748 20 207 96
2013 Estimated using AADF from previous year on this link 21,230 16,445 2,891 1,638 22 157 99
2012 Estimated using AADF from previous year on this link 21,201 16,644 2,723 1,589 22 149 95
2011 Estimated using AADF from previous year on this link 21,196 16,765 2,615 1,569 24 153 94
2010 Manual count 21,243 16,866 2,556 1,573 28 155 93
2009 Manual count 22,350 17,662 2,564 1,829 24 213 82
2008 Estimated using AADF from previous year on this link 22,651 17,681 2,701 1,960 19 175 134
2007 Estimated using AADF from previous year on this link 22,796 17,805 2,696 1,982 19 181 132
2006 Manual count 22,661 17,930 2,433 1,979 19 179 140
2005 Estimated using AADF from previous year on this link 22,526 17,461 2,724 2,044 19 239 58
2004 Estimated using AADF from previous year on this link 22,558 17,584 2,605 2,060 19 249 60
2003 Estimated using AADF from previous year on this link 21,917 17,290 2,341 1,968 19 245 73
2002 Manual count 21,254 16,918 2,114 1,923 23 226 73
2001 Estimated using AADF from previous year on this link 21,977 16,964 2,362 2,257 19 275 119
2000 Manual count 21,351 16,454 2,236 2,296 22 250 115

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Data disclaimer

Traffic figures at the regional and national level are robust, and are reported as accredited official statistics. However, DfT’s traffic estimates for individual road links and small areas are less robust, as they are not always based on up-to-date counts made at these locations. Where other more up-to-date sources of traffic data are available (e.g. from local highways authorities), this may provide a more accurate estimate of traffic at these locations.

It is the responsibility of the user to decide which data are most appropriate for their purpose, and if DfT road link level traffic estimates are used, to make a note of the limitations in any published material.

Quality flags in data downloads

DfT’s road link level traffic estimates are calculated using a variety of methods, with some methods likely to produce more accurate estimates than others.

The data tables available to download here contain a column - estimation_method – showing the method used to estimate traffic for each location and year. Figures having an estimation method of “Counted” are likely to be more accurate than those marked as “Estimated”, and the latter should be used with caution.

Site details
Manual count point site 27123 details
Average annual daily flow
Number of vehicles that travel past the count point (in both directions) on an average day of the year.
Average annual daily flow by direction
Number of vehicles that travel past the count point on an average day of the year, by direction of travel.
Raw counts
Vehicle counts recorded at this count point.
Data Description Records Download
Site details Manual count point site 27123 details 1
Average annual daily flow Number of vehicles that travel past the count point (in both directions) on an average day of the year. 25
Average annual daily flow by direction Number of vehicles that travel past the count point on an average day of the year, by direction of travel. 50
Raw counts Vehicle counts recorded at this count point. 192

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