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Road traffic statistics

28038

Details

AADF latest year 2024
Region South East
Local authority Buckinghamshire
Road name A421
Road type Major
Start junction road A4421
End junction road A413
Link length 7.00km (4.35 miles)
Easting & Northing 469171,233000
Latitude & longitude 51.99116,-0.99403

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 26,198 20,763 3,715 1,542 0 108 70
2023 Manual count 25,898 20,516 3,650 1,553 0 109 70
2022 Estimated using AADF from previous year on this link 22,302 17,347 3,471 1,341 2 57 87
2021 Estimated using AADF from previous year on this link 20,711 16,162 3,116 1,301 2 51 81
2020 Estimated using AADF from previous year on this link 18,837 14,780 2,721 1,218 2 50 69
2019 Manual count 24,947 20,239 3,179 1,355 2 67 107
2018 Estimated using AADF from previous year on this link 22,265 17,137 3,546 1,372 7 121 88
2017 Estimated using AADF from previous year on this link 22,175 17,220 3,387 1,351 8 124 93
2016 Estimated using AADF from previous year on this link 21,985 17,240 3,200 1,321 8 128 96
2015 Estimated using AADF from previous year on this link 21,513 17,029 2,963 1,297 8 128 97
2014 Estimated using AADF from previous year on this link 20,636 16,531 2,666 1,218 8 123 99
2013 Estimated using AADF from previous year on this link 20,092 16,158 2,484 1,243 10 120 88
2012 Manual count 20,132 16,354 2,339 1,241 10 113 85
2011 Estimated using AADF from previous year on this link 19,333 15,631 2,225 1,272 14 121 84
2010 Manual count 19,410 15,725 2,175 1,304 16 123 83
2009 Estimated using AADF from previous year on this link 20,175 16,285 2,405 1,305 6 86 94
2008 Manual count 20,416 16,499 2,328 1,417 6 82 90
2007 Manual count 20,831 16,739 2,158 1,664 11 149 121
2006 Manual count 21,830 17,714 2,215 1,630 8 147 124
2005 Manual count 19,379 15,445 1,984 1,718 14 132 100
2004 Manual count 21,117 17,106 2,048 1,841 5 70 52
2003 Manual count 18,450 14,737 1,758 1,629 7 172 154
2002 Manual count 21,327 17,023 2,200 1,867 6 121 116
2001 Manual count 26,807 21,560 3,135 1,760 34 189 163
2000 Manual count 28,962 24,764 2,236 1,454 58 323 185

Download data

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 28038 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 28038 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. 312

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