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Road traffic statistics

7929

Details

AADF latest year 2024
Region South East
Local authority Buckinghamshire
Road name A421
Road type Major
Start junction road A413
End junction road A413
Link length 1.10km (0.68 miles)
Easting & Northing 470578,232948
Latitude & longitude 51.99052,-0.97355

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 26,025 21,012 3,342 1,468 11 124 78
2023 Manual count 25,664 20,698 3,283 1,485 11 121 78
2022 Estimated using AADF from previous year on this link 22,475 17,934 3,132 1,270 9 78 61
2021 Estimated using AADF from previous year on this link 21,039 16,791 2,889 1,230 10 71 57
2020 Estimated using AADF from previous year on this link 19,162 15,241 2,650 1,148 12 67 55
2019 Estimated using AADF from previous year on this link 24,555 20,065 3,003 1,309 10 91 88
2018 Manual count 24,331 19,816 3,029 1,302 9 97 87
2017 Estimated using AADF from previous year on this link 20,989 15,747 3,470 1,628 2 69 76
2016 Estimated using AADF from previous year on this link 20,916 15,864 3,296 1,607 2 68 81
2015 Estimated using AADF from previous year on this link 20,417 15,620 3,018 1,622 2 69 87
2014 Estimated using AADF from previous year on this link 20,548 15,912 2,869 1,611 2 68 88
2013 Manual count 20,263 16,079 2,520 1,517 2 64 83
2012 Estimated using AADF from previous year on this link 19,863 16,387 2,049 1,256 10 73 98
2011 Estimated using AADF from previous year on this link 20,152 16,457 2,134 1,389 11 81 91
2010 Estimated using AADF from previous year on this link 20,181 16,539 2,070 1,404 10 77 91
2009 Manual count 20,597 16,893 2,060 1,473 10 84 87
2008 Estimated using AADF from previous year on this link 21,200 16,737 2,445 1,790 5 131 97
2007 Estimated using AADF from previous year on this link 21,497 17,060 2,335 1,867 4 139 96
2006 Estimated using AADF from previous year on this link 22,172 17,902 2,141 1,890 7 139 100
2005 Estimated using AADF from previous year on this link 22,065 17,849 2,107 1,875 4 133 101
2004 Estimated using AADF from previous year on this link 22,556 18,307 2,053 1,962 5 131 103
2003 Estimated using AADF from previous year on this link 22,568 18,270 2,072 1,966 6 149 111
2002 Manual count 22,585 18,529 1,901 1,898 7 133 124
2001 Estimated using AADF from previous year on this link 19,774 16,003 2,067 1,408 4 159 137
2000 Estimated using AADF from previous year on this link 19,488 15,689 2,075 1,437 4 153 134

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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 7929 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 7929 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. 48
Raw counts Vehicle counts recorded at this count point. 120

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