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Road traffic statistics

28829

Details

AADF latest year 2024
Region South East
Local authority Buckinghamshire
Road name A40
Road type Major
Start junction road A355
End junction road Bulstrode Way, Gerrards Cross
Link length 4.60km (2.86 miles)
Easting & Northing 496000,189760
Latitude & longitude 51.59852,-0.61536

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 Manual count 18,679 15,746 2,125 502 16 192 114
2023 Estimated using AADF from previous year on this link 16,872 13,727 2,341 516 24 129 159
2022 Estimated using AADF from previous year on this link 16,519 13,396 2,296 528 25 138 160
2021 Estimated using AADF from previous year on this link 15,331 12,481 2,061 514 25 125 150
2020 Manual count 13,935 11,413 1,800 474 34 121 127
2019 Estimated using AADF from previous year on this link 17,841 15,086 2,102 470 28 97 84
2018 Estimated using AADF from previous year on this link 17,804 15,053 2,109 466 23 91 85
2017 Estimated using AADF from previous year on this link 17,776 15,125 2,014 454 24 93 90
2016 Manual count 17,676 15,144 1,903 441 24 95 92
2015 Estimated using AADF from previous year on this link 19,088 15,708 2,508 588 18 165 119
2014 Estimated using AADF from previous year on this link 18,342 15,248 2,256 557 18 160 121
2013 Estimated using AADF from previous year on this link 17,831 14,904 2,102 562 23 155 108
2012 Estimated using AADF from previous year on this link 17,850 15,085 1,980 534 23 147 105
2011 Manual count 17,870 15,194 1,901 521 25 151 103
2010 Estimated using AADF from previous year on this link 16,705 13,884 1,978 613 32 117 113
2009 Estimated using AADF from previous year on this link 17,007 14,226 1,928 615 32 132 106
2008 Manual count 17,154 14,413 1,866 648 28 126 101
2007 Manual count 18,561 15,520 1,858 980 27 97 106
2006 Manual count 16,459 13,313 1,873 1,068 13 102 103
2005 Manual count 17,459 14,803 1,393 908 17 230 125
2004 Manual count 16,155 13,375 1,543 982 13 127 128
2003 Manual count 16,816 14,399 1,376 784 19 159 98
2002 Estimated using AADF from previous year on this link 18,067 15,383 1,997 493 13 100 94
2001 Manual count 17,576 14,950 1,981 456 12 98 91
2000 Manual count 18,319 15,404 1,612 1,031 36 155 117

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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 28829 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 28829 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. 288

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