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Road traffic statistics

16405

Details

AADF latest year 2024
Region London
Local authority Hillingdon
Road name A40
Road type Major
Start junction road A437
End junction road A4180
Link length 2.50km (1.55 miles)
Easting & Northing 510000,184460
Latitude & longitude 51.54832,-0.41497

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 Automatic counter 104,235 78,612 17,791 6,250 131 1,294 287
2023 Manual count 101,171 76,479 17,109 6,110 117 1,198 275
2022 Automatic counter 110,026 80,868 19,699 7,709 213 1,432 317
2021 Manual count 101,044 75,162 17,336 7,062 208 1,185 299
2020 Automatic counter 100,145 75,984 16,243 6,325 102 1,073 520
2019 Manual count 106,957 83,558 15,631 6,077 83 1,172 519
2018 Automatic counter 112,409 87,504 17,944 5,072 127 1,194 694
2017 Manual count 111,461 86,809 17,488 5,280 128 1,172 711
2016 Manual count 110,987 85,855 17,854 5,223 96 1,341 714
2015 Manual count 109,153 84,961 15,935 6,238 141 1,351 667
2014 Manual count 109,162 87,140 14,787 5,030 221 1,574 631
2013 Estimated using AADF from previous year on this link 118,261 95,714 12,571 7,416 259 1,549 1,011
2012 Manual count 116,844 94,888 12,263 7,011 316 1,586 1,096
2011 Manual count 104,387 83,095 12,644 6,562 0 1,266 820
2010 Estimated using AADF from previous year on this link 97,829 79,646 11,817 5,209 1 700 457
2009 Manual count 100,345 81,856 11,949 5,364 1 746 430
2008 Manual count 87,911 70,073 8,939 6,893 0 1,016 990
2007 Manual count 91,482 71,389 12,610 5,711 33 1,231 541
2006 Manual count 106,538 83,133 15,609 5,011 78 1,996 789
2005 Manual count 107,169 89,141 9,871 6,432 55 1,157 568
2004 Manual count 105,874 85,075 10,963 7,707 50 1,589 540
2003 Manual count 111,139 92,005 10,961 6,190 51 1,301 682
2002 Manual count 106,020 85,726 11,378 7,493 18 863 560
2001 Manual count 110,544 94,218 9,358 4,836 63 1,559 573
2000 Manual count 113,071 96,267 9,771 5,323 77 1,144 566

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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 16405 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 16405 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. 456

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